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Definition of Dark Adaptation Test
Dark Adaptation Test is a test that assesses the ability to see in a dimly lighted environment. There are several ways to perform a dark adaptation test. One of the most common is to have the person sit in a dimly lit room. The examiner shines a light into the eye, gradually increasing the light’s intensity until the person reports seeing the light.
The examiner notes the light’s intensity and the length of time it takes for the light to become noticeable. Depending on the reason for the test, the examiner may direct the light to different parts of the retina to test the responsiveness of the rods (the cells responsible for low-light vision). A decrease in dark adaptation response is normal with aging as the photochemical reactions in the eye slow.
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