DO YOU HAVE GOOD CONTRAST VISION

in #busy6 years ago

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Contrast sensitivity is the visual ability to see objects that may not be outlined clearly or that do not stand out from their background. In other words, contrast sensitivity test measures the ability to distinguish between finer and finer increments of light versus dark (contrast).

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A person with low contrast sensitivity may have such vision difficulties as:
• Trouble seeing traffic lights or cars at night
• Not being able to see spots on clothes, counters, or dishes
• Missing facial gestures
• Not seeing whether a flame is burning on a stove
• Needing a great deal of light to read
• Experiencing tired eyes while watching television.

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Contrast sensitivity is a very important measure of visual function, especially in situations of low light, fog or glare, when the contrast between objects and their background often is reduced. Driving at night is an example of an activity that requires good contrast sensitivity for safety. Also measurements can be important in diabetes and cataract medicine. Cataracts are a clouding of the eye’s natural lens, which causes light to scatter on the retina, reducing image contrast and causing dimness of vision. Many cataract patients have good visual acuity, but they still notice a loss of their visual capability. Contrast sensitivity testing can provide a true "real world" vision of a patient’s functional vision.

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A person with normal visual acuity but poor contrast sensitivity might see the trees in the foreground clearly (high contrast), but have trouble seeing the contours of the mountains against the sky in the background (low contrast).Contrast sensitivity testing often is not included in a routine eye exam hence it may be missed until on present his complains to the Optometrist.

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Treatment
Contrast sensitivity test results can help determine if vision errors known as higher-order aberrations( difficulty seeing at night, glare, halos, starburst patterns or double vision) or some other problem that could be corrected with special eyewear or eye surgery.Polaroid for low contrast sensitivity, corrective lenses with a yellow filter is prescribed to improve the ability to discern contrast. Also, eyeglasses with custom lenses sometimes can improve contrast sensitivity.

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GET YOUR EYES CHECKED TODAY
#eliminatingblindness

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nice post.

Thanks for your research on contrast sensitivity. I learned a bunch from this work. @swt3df1 #eliminatingblindness

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