What are the common examination items for color blindness?
Disease description:
I always have trouble distinguishing colors when I look at them, so I suspect that I might be color blind. I would like to know what common examinations are available for color blindness. For example, is there a test that involves identifying colors through patterns? Are there other more accurate methods of examination?
Doctor's answer (1)
Dr. Wang Shuai
Color blindness, also known as color vision deficiency, is a hereditary or acquired visual disorder that primarily affects an individual's ability to distinguish colors. Its evaluation typically includes the following common tests:
1. Color blindness test charts: The most commonly used screening tool, consisting of images made up of colored dots. People with normal color vision can see hidden numbers or patterns, whereas individuals with color blindness may fail to recognize them or identify them incorrectly.
2. Color vision testing: Utilizes specific instruments or cards to present different colors under natural light, requiring the patient to correctly identify the colors in order to assess their color discrimination ability.
3. Visual field testing: A flashlight or similar tool is used to illuminate the peripheral areas of the patient's visual field to evaluate whether there are any defects or impairments.
4. Fundus examination: A slit lamp or ophthalmoscope is used to observe the internal structures of the eye, such as the retina and macula, to assess their condition and ensure normal function.
