Factors limit visual acuity. Medical search. Frequent questions

The investigators developed two proof-of-concept studies to test whether levodopa improves visual acuity and the anatomical changes caused by nAMD. (elsevier.com)

Twenty five-gauge vitrectomy results in favorable visual and anatomic outcomes for MF. (dovepress.com)
Indirect evidence supports the utility of multiple screening tests for identifying preschool children at higher risk for vision problems and the effectiveness of some treatments for improving visual acuity outcomes. (uspreventiveservicestaskforce.org)
To determine patient and surgical factors associated with the use of 360-degree laser retinopexy during primary pars plana vitrectomy (PPV) ± scleral buckle (SB) for rhegmatogenous retinal detachment (RRD) and its impact on surgical outcomes. (biomedcentral.com)
Secondary outcomes included visual acuity, epiretinal membrane formation, the presence of cystoid macular oedema, tonic pupil and corneal epithelial defects. (biomedcentral.com)
Just under half of the SNPs assessed in the CFH gene and 15% of the SNPs assessed in the VEGF gene were found to be associated with visual outcomes or the number of injections required during follow-up. (nih.gov)
Clinical factors such as higher age, a better visual acuity (VA), a larger choroidal neovascularization (CNV) lesion at baseline, and a delay between symptom onset and initiation of treatment of more than 3 weeks also impact outcomes. (nih.gov)
Most available evidence suggests a strong association of clinical factors such as age, baseline VA, and CNV lesion size with anti-VEGF treatment outcomes. (nih.gov)
No behavioral factors such as smoking influence treatment outcomes. (nih.gov)
Based on the studies conducted so far, the evidence suggests that underlying genotype of known AMD risk associated genes or of the VEGF-A gene have a limited effect, whereas presenting clinical factors appear to be more important in determining treatment outcomes. (nih.gov)
This trial demonstrated for the first time that levodopa is safe, well-tolerated and delayed anti-VEGF injection therapy while improving visual outcomes. (elsevier.com)
Purpose: To evaluate the surgical management, outcomes and prognostic factors of full thickness macular holes without residual internal limiting membrane (NO-ILM FTMHs). (unipg.it)
The primary outcomes were hole closure and final best-corrected visual acuity (BCVA). (unipg.it)

The main outcome measures were the best-corrected visual acuity (BCVA) and the optical coherence tomography (OCT) findings. (dovepress.com)
On initial presentation, the best corrected visual acuity (BCVA) was less than 20/40 (Snellen equivalent) in 55% of the affected eyes and 20/20 or better in 9% of the affected eyes. (aerzteblatt.de)

Optical factors of the eye influence the sharpness of an image on its retina. (wikipedia.org)
Neural factors include the health and functioning of the retina, of the neural pathways to the brain, and of the interpretative faculty of the brain. (wikipedia.org)
Neural factors that limit acuity are located in the retina, in the pathways to the brain, or in the brain. (wikipedia.org)
The retina is made of light-sensitive tissue that sends visual messages via nerve impulses to the brain through the optic nerve. (healthywomen.org)
Exacerbation of choroidal and retinal pigment epithelial atrophy after anti-vascular endothelial growth factor treatment in neovascular age-related macular degeneration[J]. Retina (Philadelphia, Pa), 2014, 34(7): 1308-1315. (shsmu.edu.cn)
There are an awful lot of considerations to take into account when making such a claim such as contrast, distance, the resolution of the display and some metric of pixel size which gives you an estimate of visual resolution on the retina. (utah.edu)
This enables us to have disease and affects many parts of the a stereoscopic view of the retina and its body, including the eye, leading to visual A retrospective observational study vasculature. (who.int)

Thereafter, monitoring and treatment intervals should be determined by the physician and should be based on disease activity, as assessed by visual acuity and/or anatomical parameters. (medicines.org.uk)

Patching plus glasses improved visual acuity by about 1 line after 1 year (0.11 logMAR [95% CI, 0.05-0.17]) for children not pretreated with glasses (1 RCT, 177 participants). (uspreventiveservicestaskforce.org)
Glasses alone improved visual acuity by less than 1 line after 1 year (0.08 logMAR [95% CI, 0.02-0.15], 1 RCT, 177 participants). (uspreventiveservicestaskforce.org)
VA was converted from units on a tumbling 'E' chart to the logarithm of the minimal angle of resolution VA (logMAR VA). Vision-related QoL was assessed using the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25). (gjcsro.com)

As the tumor enlarges, it may cause distortion of the pupil (iris melanoma), blurred vision (ciliary body melanoma), or markedly decreased visual acuity caused by secondary retinal detachment (choroidal melanoma). (cigna.com)

A common optical cause of low visual acuity is refractive error (ametropia): errors in how the light is refracted in the eye. (wikipedia.org)
To review the evidence on screening for and treatment of amblyopia, its risk factors, and refractive error in children aged 6 months to 5 years to inform the US Preventive Services Task Force. (uspreventiveservicestaskforce.org)
Positive likelihood ratios were between 5 and 10 for amblyopia risk factors or nonamblyogenic refractive error in most studies of test accuracy and were greater than 10 in most studies evaluating combinations of clinical tests. (uspreventiveservicestaskforce.org)
The most common causes of vision problems in children are amblyopia (a neurodevelopmental disorder that arises from abnormal processing of visual images that leads to a functional reduction of visual acuity) and its associated risk factors ( Table 1 ), nonamblyopic strabismus and nonamblyopic refractive error. (uspreventiveservicestaskforce.org)

The study also investigates the impact of 360-degree laser on visual outcome and incidence of common complications. (biomedcentral.com)

The medical records of 40 eyes of 36 patients that had undergone 25-gauge vitrectomy with internal limiting membrane peeling for MF were studied. (dovepress.com)
TissueBlue (brilliant blue G ophthalmic) is a disclosing agent indicated to selectively stain the internal limiting membrane during vitreoretinal surgery. (medscape.com)
classified outer retinal tubulations as either open (incomplete closure with curving external limiting membrane at the ends, horizontally elongated shape in cross-section) or closed (completely encircled, oval shape in cross-section) ORTs [ 4 ]. (biomedcentral.com)

5 CSCR most commonly is a self-limiting condition, with resolution of retinal changes and return to baseline visual acuity within 3 months. (health.mil)
Conversely, a worse acuity at baseline predicted more gain in vision. (nih.gov)
Overall, patients presenting with good acuity at baseline were more likely to have good VA at follow up, but the gain afforded by treatment was impacted by a ceiling effect. (nih.gov)
Spectral domain − optical coherence tomography images of the same macular segmentation line at baseline and monthly follow-up visits in a patient naïve to intravitreal anti-vascular endothelial growth factor (VEGF) therapy. (elsevier.com)
However, clinical studies have suggested that the visual acuity returned to a baseline level several years after anti-VEGF therapy, with the occurrence of retinal fibrosis and geomorphologic atrophy, highlighting the limit of this treatment. (shsmu.edu.cn)

Using visual acuity criterion alone is likely to miss a large proportion of children with HVFDs and a diagnosis of CVI should be based on the combined presence of multiple factors with reduced visual acuity being a contributory but not the defining criteria. (frontiersin.org)

We will also investigate Dawes Limit Law and its restrictions, the Rayleigh Limit , the Contrast Transfer, as well as the very best way to determine the angular resolving power of a telescope system by using the Strehl Ratio benchmark. (astronomy-electronics-centre.com.au)
Yet, for individuals with conditions such as cataracts, this can further reduce their visual acuity and contrast sensitivity. (visionbuddy.com)
6-8 In multifocal or multi-zone soft contact lenses, the impact of increasing Add powers on vision is a limiting factor: due to the singular point focus at the line of sight, visual acuity and contrast sensitivity is impacted up to +2.00D or +3.00D add powers and haloes typically experienced. (myopiaprofile.com)
Claims of contrast ratios are notoriously flexible in a number of displays and will be influenced by a number of optical factors as well as the content being viewed and the black and color levels of the pixels as well as overall luminance. (utah.edu)

Visual acuity is typically measured while fixating, i.e. as a measure of central (or foveal) vision, for the reason that it is highest in the very center. (wikipedia.org)
Visual acuity is typically measured with the use of a standard eye chart called the Snellen chart. (gsu.edu)

The management of SpA has dramatically improved over the last decades due to the development of new treat-to-target strategies and to the introduction of biologic disease modifying antirheumatic drugs (bDMARDs), particularly tumor necrosis factor alpha inhibitors (TNFis), currently used for the treatment of nonresponder patients to conventional synthetic agents. (hindawi.com)
Among biologic disease modifying antirheumatic drugs (bDMARDs), tumor necrosis factor alpha inhibitors (TNFis) are currently widely used for the treatment of SpA. (hindawi.com)

In validation research conducted by VEHSS, the self-report question included in BRFSS showed marginal diagnostic accuracy for predicting best corrected visual acuity loss and blindness in a sample of ophthalmology and optometry patients. (cdc.gov)
The prevalence of this measure cannot be directly translated into the prevalence of objectively measured visual impairment or blindness. (cdc.gov)
Considering the potential consequences of untreated AAU, early diagnosis and aggressive treatment are crucial to avoid complications of remittent or chronic eye inflammation, such as visual loss and blindness. (hindawi.com)
Among these factors is speed blindness, a phenomenon with consequences. (techtuv.com)
Additionally according to the NHTSA, when driving at speeds factors such, as road curvature and uneven surfaces can reduce your vision and lead to speed blindness. (techtuv.com)
Internal factors also play a role in causing speed blindness. (techtuv.com)
ABSTRACT We assessed the causes of visual impairment and blindness in 694 diabetic patients attending our eye centre in Sana'a, Yemen from 2001 to 2005 by review of their medical records. (who.int)
Cataract, proliferative diabetic retinopathy (PDR) and diabetic maculopathy were the main causes of visual impairment and blindness. (who.int)
Diabetic retinopathy is a public health problem in Yemen and national screening and educational programmes are highly needed to reduce the risk of visual impairment and blindness among diabetics. (who.int)
The causes and magnitude of blindness and visual impairment need to be determined before appropriate strategies can be developed and international alliances for the prevention of blindness alliances established. (who.int)
This initiative has promoted WHO's strategy for the prevention of avoidable blindness and visual impairment, which is based on disease control, human resource development, and infrastructure and technology. (who.int)
Continued systematic collection of epidemiological data on blindness and visual impairment enabled WHO to publish more detailed statistics in 2004 and 2006. (who.int)

Currently available evidence on predictors of anti-vascular endothelial growth factor (VEGF) treatment response in neovascular age-related macular degeneration was reviewed. (nih.gov)
It is a vascular endothelial growth factor (VEGF) inhibitor. (medscape.com)
Neovascular AMD (nAMD) is characterized by the abnormal growth of new blood vessels, triggered by vascular endothelial growth factor (VEGF), which can cause fluid and blood to leak in the subretinal space of the eye. (elsevier.com)
We aimed to analyze the differences in the prevalence of outer retinal tubulation (ORT) in neovascular age-related macular degeneration (AMD) treated with anti-vascular endothelial growth factor (anti-VEGF) agents, either aflibercept or ranibizumab. (biomedcentral.com)
Anti-vascular endothelial growth factor (VEGF) has been the first choice in the treatment of wet age-related macular degeneration (AMD), since ranibizumab went on sale in 2006. (shsmu.edu.cn)
Review and prospect of anti-vascular endothelial growth factor treatment for wet age-related macular degeneration[J]. JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY (MEDICAL SCIENCE), 2021, 41(4): 530-534. (shsmu.edu.cn)
Bevacizumab neutralizes the protective effect of vascular endothelial growth factor on retinal ganglion cells[J]. Mol Vis, 2010, 16: 1848-1853. (shsmu.edu.cn)
Expression of vascular endothelial growth factor (VEGF) and its two receptors (VEGF-R1-Flt1 and VEGF-R2-Flk1/KDR) in non-small cell lung carcinomas (NSCLCs): correlation with angiogenesis and survival[J]. J Pathol, 1999, 188(4): 369-377. (shsmu.edu.cn)
Identification of a natural soluble form of the vascular endothelial growth factor receptor, FLT-1, and its heterodimerization with KDR[J]. Biochem Biophys Res Commun, 1996, 226(2): 324-328. (shsmu.edu.cn)

Examples of conditions affecting the brain include amblyopia (caused by the visual brain not having developed properly in early childhood) and by brain damage, such as from traumatic brain injury or stroke. (wikipedia.org)
A review of the literature found that amblyopia was the biggest vision-limiting factor. (wustl.edu)

Patients with MEWDS have unilateral visual loss and have small lesions that usually are located in the midperiphery. (medscape.com)
Typical symptoms include objects appearing smaller than normal (micropsia), straight lines appearing wavy (metamorphopsia), or partial loss or distortion of a portion of the central visual field. (health.mil)
CSCR is a significant cause of both temporary and permanent loss of visual function among individuals aged 30-50 years. (health.mil)
Other causes of visual loss are ischemia and the presence of central hemorrhage. (openophthalmologyjournal.com)
Early treatment is key to limiting the extent of sight loss with this common condition. (guidedogs.org.uk)
A loss of auditory acuity can be a life threatening situation for a firefighter, as so much of their work, when fighting a fire, takes place in an area where visual perception is significantly reduced or all together lost. (cdc.gov)
Aging professional athletes often begin to exhibit reduced foot and hand speed, slower recovery, loss of reaction time, and decreased visual acuity and balance. (boost-your-low-testosterone.com)
The spectrum of damage ranged from focal photoreceptor defects to macular foramina and retinal hemorrhages associated with loss of visual acuity and central scotoma. (aerzteblatt.de)

This article is about the optical resolving power, resolution, and sharpness of a telescope system, the best way to measure them, and the factors which can affect them. (astronomy-electronics-centre.com.au)
Sharpness or acuity can be defined as thinness of edge or fineness of point . (astronomy-electronics-centre.com.au)
Below we will examine and discuss the most important factors which are likely to affect the visual resolving power, as well as the photographic resolution and sharpness of a telescope optical system. (astronomy-electronics-centre.com.au)
Achromatopsia also involves other problems with vision, including an increased sensitivity to light and glare (photophobia), involuntary back-and-forth eye movements (nystagmus), and significantly reduced sharpness of vision (low visual acuity). (medlineplus.gov)

For genetic factors, most evidence to date has been generated for single nucleotide polymorphisms (SNPs) in the complement factor H (CFH), and VEGF-A genes. (nih.gov)
Treatment combined with anti-platelet-derived growth factor may compensate for the limitations of anti-VEGF therapy through peripheral cells. (shsmu.edu.cn)

External and internal exposomes are measures of environmental factors that individuals are exposed to, and have been increasingly studied for their impact on ocular surface diseases. (bvsalud.org)

According to Dr. Snyder, although this limited proof-of-concept study included a small sample size and limited patient diversity, its findings suggest efficacy and support the targeting of the GPR13 receptor with levodopa for the treatment of nAMD in future studies. (elsevier.com)

Fluid accumulation causes anatomic and functional changes affecting visual function. (health.mil)
In our series of 7 cases, we documented impaired visual acuity, central visual field defects, circumscribed and sometimes complex changes of retinal reflectivity, and intraretinal fluid. (aerzteblatt.de)
After six months the decrease in retinal fluid was sustained and mean visual acuity improved enabling patients in the first and second group to read an additional line on the eye chart. (elsevier.com)

The failure to neutralize the viewing position effect is interpreted in terms of perceptual learning: since normally, because of acuity limitations, the only information available in parafoveal vision concerns low-resolution features of letters, even when magnification provides better information, readers are unable to make use of it. (univ-paris5.fr)
This leads to a lack of understanding of the child's visual perceptual difficulties. (frontiersin.org)
However, HVFDs, in presence of good visual acuity, often remain undiagnosed because good visual acuity precludes further investigation leading to a lack of understanding of the child's visual perceptual difficulties. (frontiersin.org)

They may lack visual acuity, vocabulary or comprehension skills, or be second language learners. (gale.com)

Prior research has shown that patients with limited health literacy are at increased risk for misunderstanding the appropriate dosing of acetaminophen, a commonly used nonprescription medication that can cause acute liver failure after an overdose. (ahrq.gov)
Visual acuity (VA) commonly refers to the clarity of vision, but technically rates a person's ability to recognize small details with precision. (wikipedia.org)
The most commonly referred-to visual acuity is distance acuity or far acuity (e.g., "20/20 vision"), which describes someone's ability to recognize small details at a far distance. (wikipedia.org)
Risk factors such as diabetes, hypertension, and smoking are commonly shared between kidney and eye diseases. (bvsalud.org)
Cerebral Visual Impairment (CVI) is a heterogenous disorder of brain-based visual impairment resulting from brain injury or disruption of development of retrochiasmatic visual pathways and vision processing regions of brain, commonly occurring during gestation at or around birth. (frontiersin.org)

This is another example of the remarkable nature of human senses: the most acute vision is within about a factor of two of the physical limits imposed by diffraction! (gsu.edu)

However, low vision devices offer hope and empowerment to individuals living with visual impairments, including those living with macular degeneration, retinitis pigmentosa, and glaucoma. (visionbuddy.com)
1 In the United States, the most common causes of nonrefractive visual impairment are age-related macular degeneration, cataract, diabetic retinopathy, glaucoma, and other retinal disorders. (cdc.gov)

Both reduced visual acuity and lower health literacy were independent risk factors for dosing errors and for insufficient understanding regarding the simultaneous use of multiple acetaminophen-containing products. (ahrq.gov)
Although the etiology of CSCR remains poorly understood, a number of risk factors for the condition have been identified. (health.mil)
The Behavioral Risk Factor Surveillance System (BRFSS) is the nation's premier system of health-related telephone surveys that collect state data about US residents regarding their health-related risk behaviors, chronic health conditions, and preventive services use. (cdc.gov)
To determine environmental risk challenges in resource-limited settings. (cdc.gov)
This case report discusses anterior capsular phimosis in a patient without the typical risk factors for anterior capsule contraction syndrome. (bvsalud.org)
Another risk factor for glaucoma is high pressure within the eye. (healthywomen.org)
The progression of the disease is faster in those who have the specific risk factors for progression, namely, Japanese ancestry, cardiovascular disease, family history of any kind of glaucoma and being female. (healthywomen.org)
There are several risk factors that lead to an increased risk of developing glaucoma. (guidedogs.org.uk)
The causes are unknown, but some factors could put you at a higher risk, such as if it runs in your family. (guidedogs.org.uk)
In view of these susceptibility factors, numerous observational studies have attempted to explore the relationship between sunlight exposure and risk of uveal melanoma. (cigna.com)
3 ] Similarly, there is no consistent evidence that occupational exposure to UV light or other agents is a risk factor for uveal melanoma. (cigna.com)
Usual y, the beginning occurs in an insidious way and without symptoms and, in many cases, can explain the delay in its diagnosis(1), considered a risk factor for the development of disabilities. (bvsalud.org)
Another significant factor that patients should be aware of is the risk of complications associated with this procedure. (internationalvisioncenters.com)
Male sex and family history of colour vision defects were risk factors. (who.int)
To estimate prevalence of nonrefractive visual impairment and to describe its relationship with demographic and systemic risk factors including diagnosed diabetes. (cdc.gov)
Prevalence of nonrefractive visual impairment was significantly higher in 2005-2008 than in 1999-2002 and may be attributable, in part, to higher prevalence of diabetes, an associated risk factor that increased in prevalence during this time period. (cdc.gov)
Past medical history should include known disorders that are risk factors for eye pain, including autoimmune disorders, multiple sclerosis, migraine, and sinus infections. (msdmanuals.com)

The objectives of this study were to assess relationships between vision-related quality of life (QoL) and visual acuity (VA) in Ebola virus disease (EVD) survivors after cataract surgery in the Ebola Viral Persistence in Ocular Tissues and Fluids (EVICT) Study. (gjcsro.com)
Further testing may be needed to determine how much the cataract is affecting vision and to evaluate whether other eye diseases may limit vision following cataract surgery. (aoa.org)

To determine the prevalence and predictors of colour vision defects among Assiut university students and to iden- tify their relationship with self-reported visual function and perceived difficulties in performing daily activities. (who.int)
The prevalence of visual impairment cein angiography. (who.int)

This blockage increases the pressure in the eye, which damages the optic nerve and limits your vision. (guidedogs.org.uk)
Extraocular muscle inflammation and optic nerve compression result in visual changes in visual acuity. (medscape.com)

The advantages of minimally invasive vitreous surgery are that no wound suture is required because of the smaller incision size, less inflammation, less patient discomfort, faster recovery of visual acuity, and occasional shorter operative time. (dovepress.com)
Understanding the changes in the ocular surface microbiome and the impact of various other exposomes may also help to establish the causative factors underlying ocular surface inflammation and scarring, the hallmarks of OSDs. (bvsalud.org)

AZOOR is characterized by the following common clinical features: minimal initial ophthalmoscopic changes, followed later by signs of retinochoroidal degeneration, rapid reduction in one or more parameters of the visual field, photopsia, and abnormalities on electrophysiologic testing. (medscape.com)

Data were collected by self-administered questionnaire consisting of: personal characteristics, prior awareness of colour vision defects, dif- ficulties in daily colour vision activities, and visual function. (who.int)

however, in a small percentage of patients, atrophy and scarring of the retinal pigment epithelium develop with resultant poor visual acuity. (medscape.com)
Overall, laser treatment of perfused macular edema only minimally improves vision and offers little hope for patients with poor pretreatment visual acuity. (openophthalmologyjournal.com)
Patients may be advised to monitor for increased visual symptoms and follow a regular check-up schedule. (aoa.org)
If patients are being treated according to a treat-and-extend regimen, once maximum visual acuity is achieved and/or there are no signs of disease activity, the treatment intervals can be extended stepwise until signs of disease activity or visual impairment recur. (medicines.org.uk)
According to the World Health Organization definitions, 273 (39.3%) patients had visual impairment and 109 (15.7%) were blind. (who.int)
RÉSUMÉ Nous avons évalué les causes des déficiences visuelles et de la cécité chez 694 patients diabétiques ayant consulté dans notre centre des soins oculaires à Sanaa (Yémen) entre 2001 et 2005 en examinant leur dossier médical. (who.int)

However, acuity in peripheral vision can be of equal importance in everyday life. (wikipedia.org)
A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 metres or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. (wikipedia.org)
In the expression 6/x vision, the numerator (6) is the distance in metres between the subject and the chart and the denominator (x) the distance at which a person with 6/6 acuity would discern the same optotype. (wikipedia.org)
If you could just resolve the letters two rows up from the normal vision line at 20 feet, your acuity would be labeled 20/40 and if you could resolve two lines down it would be labeled 20/10. (gsu.edu)
If the above describes the standard for normal vision, what are the factors which limit the resolution of human vision? (gsu.edu)
Studies directly evaluating the effectiveness of screening were limited and do not establish whether vision screening in preschool children is better than no screening. (uspreventiveservicestaskforce.org)
Vision problems were reported by the workers, specifically eye strain and burning or itching eyes, temporarily blurred vision, double vision, color fringes and permanent deterioration of visual acuity. (cdc.gov)
It can also go on to affect central vision and the ability to see detail (visual acuity). (guidedogs.org.uk)
Like angle-closure glaucoma, it typically affects peripheral vision first but can also impact your ability to see detail (known as acuity) or affect your entire visual field. (guidedogs.org.uk)
Below, we provide explanations of visual aids that you may want to consider, categorizing them into optical aids for the visually impaired and electronic devices for low vision. (visionbuddy.com)
Patient history to determine if vision difficulties are limiting daily activities and other general health concerns affecting vision. (aoa.org)
Visual acuity measurement to determine to what extent a cataract may be limiting clear distance and near vision. (aoa.org)
These individuals have limited color vision, and their other vision problems tend to be less severe. (medlineplus.gov)

11% of adults with diabetes have a visual acuity of less than 20/40, and 3.8% (one-third of the 11%) of these cases cannot be corrected with refraction. (cdc.gov)

CVDs and self-reported visual function and perceived between individuals who share a common ancestor due difficulties in performing daily activities of study and to geographical isolation or religious belief ( 4 ). (who.int)

CSCR can affect critical visual performance by degrading central visual acuity. (health.mil)

At 48 weeks, brolucizumab was demonstrated to be noninferior to aflibercept in mean best-corrected visual acuity. (medscape.com)

The treatment of visual impairment due to CNV should be determined individually per patient based on disease activity. (medicines.org.uk)
Currently, about 314 million people worldwide live with visual impairment due to either eye diseases or uncorrected refractive errors. (who.int)

Treatment in adults is initiated with one injection per month until maximum visual acuity is achieved and/or there are no signs of disease activity i.e. no change in visual acuity and in other signs and symptoms of the disease under continued treatment. (medicines.org.uk)

The distance between the person's eyes and the testing chart is set so as to approximate "optical infinity" in the way the lens attempts to focus (far acuity), or at a defined reading distance (near acuity). (wikipedia.org)
However, the smaller aperture also reduces the effects of any aberrations in the lens, which would act to increase visual acuity. (gsu.edu)

During this time, a rapid improvement in the visual acuity may occur. (medscape.com)
HVFDs can occur even in the presence of good visual acuity and may remain undiagnosed because the good visual acuity does not prompt further investigation. (frontiersin.org)

Both visual resolving power and photographic resolution tests, as well as their respective limitations and usefulness, will also be part of this detailed examination. (astronomy-electronics-centre.com.au)

If the illumination is increased, the iris will constrict more and the diffraction at the smaller aperture would tend to diminish the acuity. (gsu.edu)

Therefore, timely and successful treatment of RRD is crucial for improved visual prognosis [ 3 ]. (biomedcentral.com)
Treatment options after laser-pointer-induced ocular trauma are limited. (aerzteblatt.de)
Cataract treatment is based on the level of visual impairment they cause. (aoa.org)
If, in the physician's opinion, visual and anatomic parameters indicate that the patient is not benefiting from continued treatment, Lucentis should be discontinued. (medicines.org.uk)
The number of injections, the presence or absence of subretinal hyperreflective material (SHRM) at treatment initiation and visual acuity were also noted. (biomedcentral.com)

They found that 39% of participants had limited health literacy and 54% had low visual acuity. (ahrq.gov)

In clinical practice Cerebral Visual Impairment (CVI) is typically diagnosed by observation of abnormal visually guided behaviors which indicate higher visual function deficits (HVFDs) suggesting abnormal brain development or brain damage in a child with a suitable clinical history. (frontiersin.org)
In clinical practice, CVI is typically diagnosed in a child with a suitable clinical history by observation of abnormal visually guided behaviors (i.e., behaviors that rely on normal visual function) that suggest abnormal brain development or brain damage. (frontiersin.org)

Glare is particularly problematic for those with a visual impairment. (visionbuddy.com)

Limited accessibility: Higher costs may limit access to quality care for those who cannot afford expensive procedures like LASIK. (internationalvisioncenters.com)

To examine whether diffraction is the limiting factor, it is interesting to compare this standard of resolution with the limits imposed by diffraction. (gsu.edu)
Methods: We added 10 questions to the existing Porter Novelli's ConsumerStyles surveys in fall 2020 (N = 4,548) and spring 2021 (N = 6,455) to examine factors that contribute to overall household preparedness levels. (cdc.gov)

Another complicating factor is that sometimes the workstation must accommodate the individual preferences of two or more people at the same time. (hermanmiller.com)
Students may be unmotivated, see reading as of little value, or be enticed by alternate endeavors and have limited time to read. (gale.com)
Over time, visual acuity tended to improve, and scotoma subjectively decreased in size. (aerzteblatt.de)
HN-1: Airborne Exposure Limit (as recommended by the Surgeon General's Working Group, U.S. Department of Health and Human Services) = 0.003 mg/m 3 as a time-weighted average (TWA) for the workplace. (cdc.gov)

Human factors are heavily implicated and consistent checks, scenario based simulation training, detailed incident reporting and causal analysis is recommended to enhance patient safety. (uk.com)

The calculation I used predicts a visual acuity distance of 36.4 inches for your display, so your results roughly correspond to the generalized rule. (carltonbale.com)
Each factor can influence the results of the screening test, but so far these factors have not been standardised and therefore comparison across programmes is limited. (cehjournal.org)
Ethambutol (or streptomycin in children too young to be monitored for visual acuity) should also be included until the results of drug susceptibility studies are available, unless there is little possibility of drug resistance (see Section 1 above). (cdc.gov)

Anatomy27

Organisms3

Diseases88

Chemicals and Drugs12

Analytical, Diagnostic and Therapeutic Techniques and Equipment74

Psychiatry and Psychology29

Phenomena and Processes30

Disciplines and Occupations2

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture1

Information Science3

Named Groups1

Health Care16

Geographicals1

Improves visual acuity1

Outcomes12

BCVA2

Retina7

Anatomical1

LogMAR3

Choroidal1

Refractive error4

Outcome1

Membrane3

Baseline5

Contributory1

Contrast4

Typically measured2

Inhibitors2

Blindness12

Vascular endoth9

Amblyopia2

Loss8

Sharpness4

VEGF2

Measures1

Findings1

Fluid3

Perceptual3

Comprehension1

Commonly5

Acute1

Macular degeneration2

Risk17

Cataract surgery2

Prevalence2

Optic nerve2

Inflammation2

Reduction1

Defects1

Patients6

Vision13

Diabetes1

Difficulties1

Critical1

Aflibercept1

Impairment due2

Symptoms1

Lens2

Occur2

Limitations1

Aperture1

Treatment5

Participants1

Clinical2

Glare1

Higher1

Examine2

Time4

Patient1

Results3