Conditions contrast sensitivity. Medical search. Frequent questions

ISRCTN13894787 ) were assessed using a range of psychophysical measures of visual function, including best corrected visual acuity (BCVA), letter contrast sensitivity (CS), mesopic and photopic CS, mesopic and photopic glare disability (GD), photostress recovery time (PRT), reading performance and subjective visual function, using the National Eye Institute Visual Function Questionnaire-25 (NEI VFQ-25). (bmj.com)
However, there are some concerns regarding the visual quality provided by MIOLs, such as glare, halos or reduced contrast sensitivity (CS). (scirp.org)
Tinted lenses filter out glare, and the yellow tint can help the patient see contrasts more clearly, especially at night. (ialvs.com)
At the recent ARVO meeting in Seattle, a number of vision scientists described studies in which significant vision loss could not be detected by standard visual acuity, but could be detected by contrast sensitivity and glare testing. (vectorvision.com)
He therefore conducted another study where he evaluated both contrast sensitivity and glare. (vectorvision.com)
Best corrected visual acuity (BCVA) was measured in photopic (BCVAphotopic) and mesopic (BCVAmesopic) conditions and under glare (BCVAglare). (journalofoptometry.org)
Experiencing light glare at night may be an indication of low contrast sensitivity . (paragoneyes.com)
Poor contrast sensitivity is easiest to notice while driving at night or in foggy conditions where light may reflect and create a glare. (paragoneyes.com)
The most common positive dysphotopsia reported was edge glare, which is due to internal reflections at the rectangular edge of the AcrySof IOL under mesopic conditions with a large pupil. (crstodayeurope.com)
There is extensive evidence that demonstrates that, even in the absence of a significant reduction in Snellen visual acuity, Fuchs dystrophy reduces contrast sensitivity and causes glare. (crstoday.com)
Visual acuity, contrast sensitivity, glare sensitivity and kinetic visual fields were measured at each test session. (bmj.com)
Purpose: To determine whether contrast sensitivity (CS) can represent photophobia in intermittent exotropia (IXT) by comparingthe CS test with and without glare stimulus, and to analyze the factors of IXT affecting CS. (kyobobook.co.kr)
We compared CS undermesopic and photopic conditions, with and without glare. (kyobobook.co.kr)
We compared the difference in CS before and after glare (ΔCS) betweenmesopic and photopic conditions, and compared CS with glare between patients with and without photophobia. (kyobobook.co.kr)
The group with subjective photophobia showed lowerCS at 10.2 cpd under mesopic conditions with glare. (kyobobook.co.kr)
However, CS tended to decrease with glare stimulus, andCS under mesopic conditions with glare was worse when accompanied by photophobia. (kyobobook.co.kr)
Binocular contrast sensitivity function was measured with the Optec 6500 FACT contrast sensitivity chart at distance and at three lighting conditions (85 cd/m2 and 3 cd/m2 with and without glare) in 36 eyes of 18 patients implanted with the AcrySof ReSTOR aspheric SN6AD3 IOL and 40 eyes of 20 patients implanted with the Acri.LISA 366D IOL. (fernandez-vega.com)
When you have normal CS in your vision, you can recognize objects and details in low-light conditions, high-glare conditions or foggy situations. (nvisioncenters.com)
Early symptoms may be loss of contrast, glare (ie, halos and starbursts around lights, not photophobia), needing more light to see well, and problems distinguishing dark blue from black. (msdmanuals.com)
They are also the type most likely to cause loss of contrast as well as glare (halos and starbursts around lights), especially from bright lights or from car headlights while driving at night. (msdmanuals.com)

These results indicate that the characteristics of human visual system to detect spatial frequencies in photopic conditions of luminance and scotopic pass through distinct mechanisms that make possible the differentiation of contrast. (bvsalud.org)
The accommodating group had better contrast sensitivity under photopic conditions at all spatial frequencies ( P ≤.04). (lww.com)
ΔCS was greater at high spatialfrequencies under photopic conditions than under mesopic conditions. (kyobobook.co.kr)
CS showed a negative correlation with stereopsis under both mesopicand photopic conditions, and a positive correlation with fusional ability at low and intermediate spatial frequencies undermesopic conditions. (kyobobook.co.kr)
Both IOLs provided contrast sensitivity within the normal range in photopic conditions. (fernandez-vega.com)
The AcrySof ReSTOR SN6AD3 and Acri.LISA aspheric IOLs provided contrast sensitivity within normal range under photopic conditions and a reduction in contrast sensitivity under mesopic conditions, with no significant differences between the two brands. (fernandez-vega.com)

A number of studies have shown that aspherical IOLs perform better compared to conventional spherical ones in terms of contrast sensitivity (CS), particularly under mesopic conditions [ 2 , 3 ]. (hindawi.com)
Moreover, a poorer degree of stereopsiswas associated with lower CS, and better fusional ability was associated with higher CS under mesopic conditions. (kyobobook.co.kr)

Prior to assessing contrast sensitivity (CS) determine distance vision/visual acuity using the Snellen chart. (academy.org.uk)
Optical quality is a subjective construct that can only be described indirectly by objective metrics such as wavefront error measurements and visual quality metrics or functional data like visual acuity and contrast sensitivity. (hindawi.com)
After the primary evaluation, iPad-based stereo acuity and contrast sensitivity tests were conducted using the subject's existing refractive correction. (tionet.in)
Visual measures including visual acuity, contrast sensitivity and stereopsis were assessed and cognitive tests administered. (bmj.com)
The patients were asked to participate in a series of tests to assess their vision, including a visual acuity test, a contrast sensitivity test and a depth perception test. (medscape.com)
The visual acuity test measured the patients' overall vision functioning, while the contrast sensitivity and depth perception tests focused on the patients' ability to distinguish between objects of different shades of color and the ability to determine relative distances between and within objects. (medscape.com)
Specifically, 96% had visual acuity levels less than age-expected values, 37% had poor contrast sensitivity and 31% failed the depth perception test. (medscape.com)
Furthermore, the BAMCA has enabled the identification of core metrics of other functional visions, such as visual acuity and contrast sensitivity, and addressed technological challenges. (xjtlu.edu.cn)
Children with brain tumors can present visual impairments like decreased visual acuity and contrast sensitivity (CS), loss of color vision, and visual field loss such as hemianopias ( 1 - 5 ). (frontiersin.org)
Generally, reduced contrast sensitivity means having poor vision acuity. (nvisioncenters.com)
Contrast sensitivity is an important measure of your visual acuity . (nvisioncenters.com)

Major parameters were monocular and binocular uncorrected (UDVA) and corrected (CDVA) distance, uncorrected (UIVA) and distance corrected (DCIVA) intermediate (80 cm), and uncorrected (UNVA) and distance corrected (DCNVA) near (40 cm) visual acuities (UNVA), contrast sensitivity (CS), defocus curve as well as patient satisfaction and spectacle use. (scirp.org)

A team from the University of Rochester studied expert video game players and found that they had better contrast sensitivity when compared with players who played non-action video games. (ghanamma.com)
These results were not because people with better contrast sensitivity were more likely to be action video game players - giving non-video game players intensive daily practice in video game playing improved this group's performance on tests of contrast sensitivity. (ghanamma.com)

Targeted disruption of the gene encoding D4Rs reduces the amplitude of the contrast sensitivity rhythm by reducing daytime sensitivity and abolishes the rhythmic expression of Npas2 and Adcy1 mRNA in the ganglion cell layer (GCL) of the retina. (jneurosci.org)
Further studies support the idea that the retina lacks a sensitivity to contrast in those who have depression. (allaboutvision.com)

The CREST trial will investigate whether enrichment of MP influences visual function among those afflicted with this condition. (bmj.com)
Supported in part by a grant from the Spanish Ministry of Health, Instituto Carlos III, Red Temática de Investigación Cooperativa en Salud Patología Ocular del Envejecimiento, Calidad Visual y Calidad de Vida, Subproyecto de Calidad Visual (RD07/0062). (lww.com)
The Merriam-Webster dictionary defines presbyopia as "a visual condition that becomes apparent, especially in middle age, in which the loss of elasticity of the lens of the eye causes defective accommodation and an inability to focus sharply for near vision. (tionet.in)
Even in this condition of external noise, the visual system is faced with the problem of selecting the detectors activated by the target and discarding those activated by the distractors. (frontiersin.org)
Reduced visual contrast sensitivity is often a symptom of a more serious eye condition, such as cataracts, glaucoma, or macular degeneration. (ialvs.com)
If symptoms are present, your IALVS low vision eye doctor will provide you with treatment options, such as visual aids and devices to help you improve contrast sensitivity. (ialvs.com)
People with reduced visual contrast sensitivity may be able to read normally if the letters are dark and the background is light, or vice-versa. (ialvs.com)
However, if the letters and the background are of a similar color or level of brightness or faintness, people with reduced visual sensitivity may struggle to read the text. (ialvs.com)
As with reading, poor visual contrast sensitivity doesn't affect the ability to see objects, except when these objects are the same or similar colors as their surroundings. (ialvs.com)
Q: What Causes Reduced Visual Contrast Sensitivity? (ialvs.com)
Difficulties with visual contrast sensitivity tend to be a symptom of another ocular problem. (ialvs.com)
Q: How Can Visual Contrast Sensitivity Be Improved? (ialvs.com)
But he said: "Contrast sensitivity is a very basic visual function, and usually they are more difficult to alter in adulthood. (ghanamma.com)
Co-investigator Vanita Jassal, MD, expected that dialysis patients would have a high rate of visual impairment due to the large percentage of this population that suffers from diabetes and hypertension, two conditions that are strongly associated with visual loss. (medscape.com)
We studied how co-occurring sounds modulate behavioral visual detection sensitivity (d'), and neural responses, for visual stimuli of higher or lower intensity. (nih.gov)
Co-occurrence of a sound enhanced human detection sensitivity for lower- but not higher-intensity visual targets. (nih.gov)
Our results indicate that multisensory enhancement of detection sensitivity for low-contrast visual stimuli by co-occurring sounds reflects a brain network involving not only established multisensory STS and sensory-specific cortex but also visual and auditory thalamus. (nih.gov)
This algorithm has been demonstrated to provide an accurate, precise, and efficient mapping of the visual field in patients with various eye conditions, including glaucoma, diabetic retinopathy, early cataract, and age-related macular degeneration. (xjtlu.edu.cn)
We show the feasibility in real-world conditions and potential effectiveness of such technology on visual perception and quality of life. (frontiersin.org)
A healthy contrast sensitivity level lets you enjoy better vision in various aspects, such as having a normal visual field. (nvisioncenters.com)
The visual system seems to utilize this phenomenon as adaptive mechanisms for luminance and contrast operate independently in many classes of visual neurons. (arvojournals.org)

The aim of this study was to measure the contrast sensitivity function (CSF) of young adults for spatial frequencies of vertical sine-wave gratings in terms of photopic and scotopic luminance. (bvsalud.org)
Someone with sensitivity to high spatial frequencies may recognize sharp edges, color, and facial features. (visioncenter.org)
Those with sensitivity only to low spatial frequencies can only make up the overall shape rather than the detailed features of an object. (visioncenter.org)
Under low lighting conditions, a reduction in contrast sensitivity for both lenses, particularly at higher spatial frequencies, was noted. (fernandez-vega.com)

Other studies indicate that depressed people often lack retinal contrast sensitivity. (visioncenter.org)
Retinal luminance adaption begins at the photoreceptor level whereas retinal contrast adaption is believed to start at later stages of processing as cones have been reported not to adapt to contrast. (arvojournals.org)

Measurements were performed to determine PET stability under varying MR conditions using the following metrics: sensitivity, scatter fraction, contrast recovery, uniformity, count rate performance, and image quantitation. (snmjournals.org)

The tester records the results to produce a contrast sensitivity function (CSF) or curve. (academy.org.uk)

The challenge in this enterprise was to develop stimuli with sufficient resolution of fine contrast variations to allow measurement of human contrast sensitivity, which can be as low as a 0.2% difference between light and dark regions of the stimulus. (visionscience.com)
However, in current clamp cones attenuated higher frequency components of the lower contrast stimuli to a greater extent than they did for the higher contrast stimuli indicating that cones shift their bandwidth depending on the contrast of the stimulus. (arvojournals.org)

and crash involvement is predicted by deficits in contrast sensitivity. (bmj.com)

If the eye doctor identifies a problem with contrast sensitivity, the main form of treatment is to treat the underlying condition, which usually improves contrast responsiveness as well. (ialvs.com)
A rich macular pigment improves contrast sensitivity thus helping to define shapes that aren't clearly outlined, such as objects in shadows, light colored objects against a bright sky. (kemin.com)

Contrast sensitivity" is important in situations such as driving at night, or in conditions of poor visibility. (ghanamma.com)

Guessing ensures the use of the three-alternative, forced-choice test method, known to improve the accuracy of contrast threshold measurement. (academy.org.uk)
The core function of noninvasive psychophysical testing is the measurement of contrast sensitivity for spatial patterns specified with some mathematical luminance profile and a controlled time course. (visionscience.com)
Adjustment, yes/no or two-alternative forced-choice psychophysical procedures are selectable for the measurement of threshold sensitivity levels. (visionscience.com)
Contrast sensitivity is a measurement of your ability to discern subtle differences between two objects. (nvisioncenters.com)
The test was named after them, and it's now considered the gold standard in contrast sensitivity measurement. (nvisioncenters.com)

Contrast sensitivity refers to the eye's ability to distinguish an object from its background. (allaboutvision.com)
The sensitivity only refers to the group of people that are indeed positive for SARS CoV-2. (uni-heidelberg.de)

The size of the sine-wave gratings, the contrast levels, and their tilt are all based on current vision science and empirical data. (academy.org.uk)
Did you know depression isn't the only condition that can lower vision perception? (allaboutvision.com)
Reduced contrast sensitivity isn't the only vision-related symptom of depression. (allaboutvision.com)
Research shows that patients with sight-threatening conditions are at an even higher risk for vision loss if they also have depression. (allaboutvision.com)
But the chances of losing your eyesight can increase if one of these vision-threatening conditions is also present. (allaboutvision.com)
It can cause vision problems such as cloudy, blurred vision and sensitivity to light. (guidedogs.org.uk)
The onset of this condition is often gradual and people may not notice a change in vision as it progresses. (ialvs.com)
None of the studies using the standard high contrast E Chart detected any vision loss. (vectorvision.com)
Several other tests of motor and sensory functions did not show any evidence of acute exposure effects, although statistically significant effects of urinary TCP on the Lanthony color vision test scores and one contrast sensitivity test score were found. (cdc.gov)
The contrast sensitivity function (CSF) is routinely assessed in clinical evaluation of vision and is the primary limiting factor in how well one sees. (nature.com)
Contrast sensitivity is often one of the first aspects of vision to be affected by ageing. (ghanamma.com)
Good contrast sensitivity also improves vision in low-light conditions, allowing us to see finer and sharper details in dim light. (kemin.com)
RP is an inherited retinal condition which destroys the light sensitive cells over a number of years first affecting your night vision. (fightforsight.org.uk)

Older people with Fuch's dystrophy may also develop cataracts , an eye condition that's quite common as we age. (guidedogs.org.uk)

And they believe this disconnection is responsible for reduced contrast sensitivity. (allaboutvision.com)

A more user friendly approach is to score in terms of contrast percentage. (academy.org.uk)

Statistical analysis showed that there were differences between the conditions of luminance, where adults were more sensitive to middle and high frequencies in the photopic luminance condition. (bvsalud.org)
Under a wide range of conditions, sensitivity to chromatic contrast is lower than that for luminance contrast. (visionscience.com)
A trade of bit-resolution between these two modalities can therefore allow increased luminance precision without detectable loss of color fidelity under many conditions. (visionscience.com)
The luminance scale is fully linearizable to 99.9% output contrast (with monitor calibration). (visionscience.com)
Contrast and its modulation are controlled by a look-up table animation, which may be split into two or four separate functions (with a corresponding loss in the number of available luminance levels for each independent image). (visionscience.com)
Different contrast levels were generated by using different modulation depths with equal mean luminance. (arvojournals.org)

8 The conditions may worsen in people with pre-existing eye conditions such as glaucoma and dry eyes . (visioncenter.org)
Visually impaired users with conditions like glaucoma, retinitis pigmentosa, color-blindness, etc. may have issues reading texts with low color contrast. (techbii.com)

The VCTS uses highly controlled advanced photographic and printing techniques to present a series of sine-wave gratings at carefully calibrated levels of contrast. (academy.org.uk)

Sensitivity to light that may be worse at night. (guidedogs.org.uk)
If the condition remains, the doctor can discuss treatment using specialized glasses that can enhance the quality and amount of light that enters the eye. (ialvs.com)
In natural scenes light intensity and contrast are statistically independent. (arvojournals.org)

We used the forced-choice psychophysical method to estimate contrast sensitivity for frequencies of 0.6, 2.5 and 5.0 cpd. (bvsalud.org)

Some people who have refractive surgery like LASIK may also experience this problem, although some actually report improved sensitivity. (paragoneyes.com)
There are many causes for strabismus, ranging from refractive errors to severe neurological conditions. (lu.se)

Using computational methods, we further demonstrated that coupled increases in intrinsic variability and sensitivity accounted for the observed functional differences between afferent classes. (elifesciences.org)
Sub-annual environmental variability resolved only partially, indicating damped sensitivity of foraminiferal communities on short timescales using established metabarcoding techniques. (lu.se)

The test is divided into six squares, starting with a high-contrast square, and with each subsequent square, the contrast is reduced in increments of 0.3 log MAR units. (tionet.in)

Our study demonstrates a circadian rhythm of contrast sensitivity that peaks during the daytime, and that its regulation involves interactions of D4Rs, the clock gene Npas2 , and the clock-controlled gene adenylyl cyclase 1 ( Adcy1 ) in a subset of retinal ganglion cells (RGCs). (jneurosci.org)
People who have a hard time distinguishing contrasts can find it difficult to see in the daytime as well. (paragoneyes.com)

Sensitivity and specificity are often perceived as rather abstract terms. (uni-heidelberg.de)

When analysing the overall response amplitudes of cones in voltage clamp conditions the shape of the transfer function does not change. (arvojournals.org)

People with contrast sensitivity difficulties may start realizing they have a problem if they keep tripping over curbs or steps because they don't see them clearly. (ialvs.com)
Navigating spaces with stairs or curbs is similarly risky when you have poor contrast sensitivity. (nvisioncenters.com)

Each correct letter has a contrast threshold value of 0.05 log units however scoring in terms of log units is reserved for research. (academy.org.uk)
The contrast sensitivity is measured in log MAR units, and the score expresses the reciprocal of the threshold contrast using the Weber contrast ratio. (tionet.in)
In a 54-year-old patient, the condition is likely to get worse with time, and I would have a lower threshold for combining DSAEK with cataract surgery. (crstoday.com)

Each row or circular grouping of patches tests at a specific spatial frequency (cycles per degree), which measures the observer's sensitivity to a particular object size. (academy.org.uk)
Each test frequency begins with a high level of contrast, which diminishes progressively with each succeeding patch. (academy.org.uk)
Spatial frequency, orientation and contrast are freely selectable. (visionscience.com)
Using dials on a small wireless power supply held in the hand, the user can adjust the sensitivity, contrast and frequency to obtain the best possible signal for different conditions as she continues to practise interpreting the signals and regaining independence. (fightforsight.org.uk)
Cones adapt to different contrast conditions not by scaling their response amplitudes but by altering their frequency bandwidth. (arvojournals.org)

Contrast sensitivity comparison between AcrySof ReSTOR and Acri.LISA aspheric intraocular lenses. (fernandez-vega.com)

The low frequencies test sensitivity to very large objects, while on the other end, high frequencies measure sensitivity to very small objects. (academy.org.uk)
This makes it harder to see objects without a high contrast of differing colours. (guidedogs.org.uk)
In contrast to our current perception about high stress sensitivity of C. jejuni , a number of clinical strains of C. jejuni were highly tolerant to multiple stresses. (cdc.gov)
Improved lighting in dialysis units, large magnifiers, and modified educational materials with large type and high contrasts can be inexpensive and effective ways to improve patient functioning. (medscape.com)
A simple rule for finding the optimal magnification to achieve high phase contrast for edge features was deduced. (lu.se)
Laser speckle contrast imaging (LSCI) uses a 780 nm laser for illumination and a high-sensitivity image sensor. (lu.se)
The division has a Zeiss Axioplan Universal microscope equipped with differential interference contrast and a High Resolution Microscopy Camera AxioCam MRm Rev. 3 FireWire, Illuminator HBO 100 as well as with a 100W mercury short-arc lamp and a system of filters to allow the fluorescence microscopy observations. (lu.se)
The microscope is further equipped with a high-sensitivity SIT video camera and an image processor, AxioVision 4 together with the Macintosh-based image analysis software. (lu.se)

The blinking square contrast sensitivity test involves showing the patient target squares at various contrast levels in different quadrants of the screen. (tionet.in)
The Pelli Robson test was designed specifically to determine if a patient has difficulties with contrast sensitivity. (ialvs.com)
However, in this test, instead of shrinking in size with each descending row, the letters show less contrast, appearing in ever weaker shades of gray against a white background. (ialvs.com)
The sensitivity and specificity of a test reflect how reliably the test can determine whether a person is positive or negative for SARS CoV-2. (uni-heidelberg.de)
In contrast to sensitivity and specificity, the predictive value does not define the proportion of people correctly diagnosed by a test. (uni-heidelberg.de)
The predictive value rather determines the probability that a positive or negative test result corresponds to the actual condition. (uni-heidelberg.de)
Evaluation of acute sensory-motor effects and test sensitivity using termiticide workers exposed to chlorpyrifos. (cdc.gov)
The test could be helpful for almost anyone, but some conditions can impact your ability to discern contrast. (nvisioncenters.com)

The change in contrast sensitivity after surgery was the best predictor of the improvements in driving performance in patients with cataract. (bmj.com)
Cataract surgery results in marked improvements in driving performance, which are related to concurrent improvements in contrast sensitivity. (bmj.com)

To counter this, your website must provide sufficient contrast between the background and text. (techbii.com)
The experiments consist of kinetic (time- kinetic data is typically not sufficient to constrain the course) measurements after TGF-b stimulation under differ- parameter values to a single optimal solution, and multiple ent conditions: untreated cells and three cases in which parameter sets can explain the available data. (lu.se)

METHODS: We determined NK cell counts and cytotoxicity in 174 (65%) ME/CFS, 86 (32%) healthy control (HC) and 10 (3.7%) participants with other fatigue associated conditions (ill control [IC]) from the Multi-Site Clinical Assessment of ME/CFS (MCAM) study using an assay validated for samples shipped overnight instead of testing on day of venipuncture. (cdc.gov)

In some cases, glasses with a yellow filter may be a good option to help create sharper contrast. (paragoneyes.com)

Sensory and motor testing was performed on a group of termiticide workers primarily using chlorpyrifos-containing products to evaluate both the acute effects from current exposure and sensitivity of the measures to detect effects. (cdc.gov)
Information also is presented on the sensitivity of the measures to detect effects in an occupationally exposed population using standard error of the parameter estimates. (cdc.gov)

The images are generated under parametric control to permit a wide variety of published and novel experiments in the detection, masking, discrimination and perception of contrast variations. (visionscience.com)

In this study, we extensively investigated the stress tolerance of 121 clinical strains of C. jejuni against 5 stress conditions (aerobic stress, disinfectant exposure, freeze-thaw, heat treatment, and osmotic stress) that this pathogenic bacterium might encounter during foodborne transmission to humans. (cdc.gov)
Although C. jejuni is transmitted to humans through the food chain or by other routes in the environment, C. jejuni encounters a wide range of stress conditions before human exposure ( Technical Appendix Figure). (cdc.gov)
In contrast to many other MHP materials this scintillator shows good stability under continuous X-ray exposure and changing environmental conditions over extended time spans of several weeks. (lu.se)

Improving contrast sensitivity usually requires physical changes in eye optics, through eye surgery, glasses or contact lenses. (ghanamma.com)
Here at Paragon Eye Associates, we can provide evaluations for this condition and recommend glasses to correct it. (paragoneyes.com)

Age-dependent reduction of orientation selectivity would require larger target-background orientation contrast to equate the accuracy of the younger group. (frontiersin.org)

This contrast mode relies on a sufficiently coherent illumination and is characterised by the appearance of an additional intensity modulations ('edge enhancement fringes') around interfaces in the image. (lu.se)

In addition to treating the depression, a doctor may recommend a number of changes to improve contrast sensitivity. (allaboutvision.com)
To improve the image contrast for small and low-density samples, it is possible to introduce a propagation distance between sample and detector to perform propagation-based phase contrast imaging (PB-PCI). (lu.se)
Celiac disease and non-celiac gluten sensitivity are entities that have shown an increase in incidence, making them a topic of interest to provide innovative therapeutic approaches and improve intestinal and extraintestinal symptoms. (bvsalud.org)

Your eyes can adapt to poor lit-condition and darkness. (nvisioncenters.com)

The observer reports the lowest contrast patch visible in each grouping and describes the orientation. (academy.org.uk)
The National Institute of Biotechnology Information (NCBI) also describes contrast sensitivity as the "degree of blackness to the whiteness of a particular object. (visioncenter.org)

Because Candida esophagitis is primarily a mucosal disease, it often is difficult to recognize with single-contrast esophagography. (medscape.com)

If you are nearsighted, you should postpone LASIK until your condition has stabilized. (medlineplus.gov)

Anatomy18

Organisms5

Diseases32

Chemicals and Drugs6

Analytical, Diagnostic and Therapeutic Techniques and Equipment44

Psychiatry and Psychology39

Phenomena and Processes32

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture1

Humanities1

Information Science2

Named Groups1

Health Care10

Geographicals1

Glare20

Photopic conditions6

Mesopic2

Acuity11

Defocus curve1

Better contrast sensitivity2

Retina2

Visual21

Spatial frequencies4

Retinal contrast2

Metrics1

Curve1

Stimuli2

Deficits1

Improves contrast2

Situations1

Measurement5

Refers2

Vision13

Cataracts1

Disconnection1

Terms of contrast1

Luminance6

Glaucoma2

Gratings1

Light3

Psychophysical1

Refractive2

Variability2

Reduced in increments1

Daytime2

Abstract1

Function1

Curbs2

Threshold3

Frequency5

Intraocular1

High8

Test8

Improvements2

Sufficient2

METHODS1

Sharper1

Detect2

Perception1

Exposure3

Glasses2

Reduction1

Illumination1

Improve3

Poor1

Describes2

Recognize1

LASIK1