Scotopic sensitivity syndrome is said to be a visual-perceptual defect related to difficulties[vague] with light source, glare, luminance, wavelength, and contrast. (wikipedia.org)
Blue light is scattered more than light of longer wavelengths, Li and colleagues wrote, and blue light scatter is the predominant cause of veiling luminance and glare disability. (drcremers.com)
Colour3
However, there is a small body of research supporting the use of colour to alleviate the symptoms associated with Irlen syndrome. (wikipedia.org)
There were no differences in visual acuity or colour vision up to 6 months after surgery, but the blue-light filtered eyes scored better in contrast sensitivity at select frequencies. (drcremers.com)
On the other hand, a comparison of another IOL (AcrySof Natural IOL, Alcon), which filters blue light, to single-piece IOLs (single-piece AcrySof IOL, Alcon), which filter only UV light, showed no difference between them in visual acuity, contrast sensitivity, or colour perception among the 93 patients implanted with one or the other. (drcremers.com)
Contrast3
Hypothetically, increasing macular pigment would improve contrast between a background consisting of blue haze and a target, thereby increasing visual range and improving discernibiltiy of a target's low-contrast internal details. (drcremers.com)
reasoned the finding may simply reflect better preoperative contrast sensitivity in the eyes scheduled to be implanted with the blue-light-filtering IOL. (drcremers.com)
Concussion3
18,19] Photophobia is one the most common symptoms in both acute and chronic phases of concussion. (researchgate.net)
Purpose of Review Concussion frequently results in visual symptoms, necessitating careful neuro-ophthalmic examination. (researchgate.net)
The present review focuses on the pathophysiology, clinical presentations, examinations, management, and future directions regarding visual disturbances after concussion. (researchgate.net)
Photophobia1
The syndrome has six characteristics: photophobia eye strain poor visual resolution a reduced span of focus impaired depth perception poor sustained focus Scotopic sensitivity syndrome is diagnosed by interviewing the client and by observing responses to certain visual tasks such as interpreting geometric figures and reading. (wikipedia.org)
Patients1
Patients presented with visual field loss or cranial neuropathies require evaluation for structural lesions. (researchgate.net)
Light3
They are intended to help people with the supposed perceptual processing difficulty known as Irlen syndrome, also known as scotopic sensitivity syndrome or visual stress, in which sensitivity to specific wavelengths of light provokes difficulty and discomfort when performing visually intensive activities such as reading. (wikipedia.org)
In a healthy eye, lutein, zeaxanthin, and mesozeaxanthin-collectively referred to as macular pigment-absorb blue light peaking at 460 nm. (drcremers.com)
An average amount of macular pigment filters out about 40% of blue light incident on the macula. (drcremers.com)
Select1
Increasing evidence suggests, however, that visual attention does not select locations with high saliency but operates on attentional units given by the objects in the scene. (bvsalud.org)
Retinal9
Dr. Do is a board-certified ophthalmologist and is an expert in the management of age related macular degeneration, diabetic retinopathy, vein occlusion, retinal detachment, macular hole, infections, cataract, and epiretinal membrane. (stanford.edu)
The use of non-invasive screening, such as retinal imaging and visual testing, may enable earlier diagnosis in the clinical setting, minimizing invasive and expensive investigations. (frontiersin.org)
In cases with concentric VF narrowing and generalised sensitivity disturbances the VF defect can be described according to alterations by retinal quadrants. (medicpdf.com)
The importance of these methods is that the retinal function can be tested in detail, and minimal cooperation of the patient is sufficient to obtain objective data on the function of the retina, the visual pathway and the visual cortex. (medicpdf.com)
In kinetic perimetry, spots of equal retinal sensitivity in the VF are searched for. (medicpdf.com)
Thus, this method indicates retinal light sensitivity at predetermined locations in the VF. (medicpdf.com)
RPE65 gene accounts for a very small proportion of patients with inherited retinal degeneration, especially Asian patients. (ekjo.org)
Because RPE65 -associated retinal dystrophy shares common clinical characteristics, such as early-onset severe nyctalopia, nystagmus, low vision, and progressive visual field constriction, with retinitis pigmentosa by other genetic mutations, appropriate genetic testing is essential to make a correct diagnosis. (ekjo.org)
The mutated product of this gene in the retinal pigment epithelium (RPE) affects the visual cycle, which leads to a progressive loss of photo-receptors. (ekjo.org)
Decreased visual acuity2
In addition to decreased visual acuity resulting from central depression of the visual field, examination characteristically demonstrates a relative afferent pupillary defect in the affected eye or, in the case of bilateral optic neuritis, the more severely affected eye. (medscape.com)
At Hopkins, she was Head of the Retina Fellowship Training Program and she conducted cutting edge research to develop more effective therapies for diabetic retinopathy and age-related macular degeneration. (stanford.edu)
In a person with GA, visual clarity can still be good if the macula - the central area of the retina responsible for sharp, central vision - is spared. (ophthalmologybreakingnews.com)
Lesions2
Less specific neuropathological lesions include granulovacuolar degeneration and eosinophilic rod-like bodies known as Hirano bodies ( 5 ). (frontiersin.org)
Beyond characterizing almost all pathological processes in the region, VF defects also help to locate the site of the lesion, as lesions interrupting the function of particular parts of the visual pathway cause specific defects. (medicpdf.com)
Defect1
Scotopic sensitivity syndrome is said to be a visual-perceptual defect related to difficulties[vague] with light source, glare, luminance, wavelength, and contrast. (wikipedia.org)
Pathway6
2012). This symptom is caused by a temporary impairment of conduction by demyelinated axons in the afferent visual pathway. (medscape.com)
The damage may affect different locations along the visual pathway, from the optic nerve to the visual centres of the occipital lobes. (medicpdf.com)
Thus, perimetric examination may indicate the site and extent of damage to the visual pathway. (medicpdf.com)
The extent of the involvement of the visual pathway may change during the progression of the pathological process. (medicpdf.com)
For objective detection of the functional alterations in the visual pathway numerous electrophysiological methods have been developed in the past two decades. (medicpdf.com)
Despite recovery of static measures of visual function, there may be impaired motion perception following optic neuritis-clinically known as the Pulfrich phenomenon. (medscape.com)
Progression3
Importantly, neuropathological progression occurs in the eye as well as the brain, and multiple visual changes have been noted in both human and animal models of AD. (frontiersin.org)
Although the fundus is usually normal, macular changes (which may show early signs of progression) and vessel narrowing may be present in some affected individuals. (nih.gov)
As the number of patients in clinics increases in the coming decades and as we, hopefully, have treatments for GA, it will be important to understand how the disease is classified, how disease progression is quantified, and the best ways to assess visual loss due to GA. (ophthalmologybreakingnews.com)
Optic3
2012). When visible, optic disc swelling typically is mild, without evidence of haemorrhages or macular exudates. (medscape.com)
Improvement of vision after acute optic neuritis typically begins within 1 month following onset of visual symptoms. (medscape.com)
While patients with optic neuritis often are said to have 'good recovery,' with 95% of eyes achieving 20/40 or better HCVA, more sensitive measures indicate that visual recovery often is incomplete. (medscape.com)
Achromatopsia is characterized by reduced visual acuity, pendular nystagmus, increased sensitivity to light (photophobia), a small central scotoma, eccentric fixation, and reduced or complete loss of color discrimination. (nih.gov)
Nystagmus develops during the first few weeks after birth followed by increased sensitivity to bright light. (nih.gov)
both nystagmus and sensitivity to bright light may improve slightly. (nih.gov)
The diagnosis of achromatopsia is established in a proband through clinical and family history, examination for nystagmus, visual acuity testing, color vision assessment, and fundoscopic examination. (nih.gov)
Pathways1
There are many methods to evaluate the function of the visual pathways (confrontation testing, Amsler test, kinetic and static perimetry). (medicpdf.com)
Duration1
sounds biased interception when the visual presentation duration of the ball was short. (bvsalud.org)
Vision2
Many people with AMD do not immediately recognise the symptoms, mistaking them for normal signs of ageing, which leads to more severe vision loss. (ophthalmologybreakingnews.com)
CI is well studied within the framework of two-alternative forced-choice tasks, but less well understood within the cadre of naturalistic action-perception loops. (bvsalud.org)
Findings1
Our findings suggest that auditory and visual signals are integrated to guide interception and that this integration process must occur early at a neural site that receives auditory and visual signals within an ultrashort time span. (bvsalud.org)
Signals1
Here, we ask how visual and auditory signals are integrated to guide interceptive movements. (bvsalud.org)
Contact lenses1
To investigate whether optical correction could reduce the delay in observers with myopia or anisomyopia, we also measured their delay using the same visual task after they were been optically corrected with contact lenses. (psych.ac.cn)
Small1
However, there is a small body of research supporting the use of colour to alleviate the symptoms associated with Irlen syndrome. (wikipedia.org)
Interpretation of the visual field (VF) is a key part of ophthalmic and neurological examinations. (medicpdf.com)
Improve visual1
1992), there are no treatments that improve visual outcomes in general. (medscape.com)
Time1
The eye uses a photoreceptor system to process circadian time that is independent of the one it uses for image perception. (arizona.edu)
Areas2
By connecting these areas of equal sensitivity, an isopter is defined. (medicpdf.com)
To get a whole picture of velocity processing for visual brain areas across speeds, we recorded single units in V1, MT, and MST in alert macaques for dots, gratings, and plaids. (psych.ac.cn)