Tests and diagnosisBy Mayo Clinic staff
If you have trouble seeing certain colors, your eye doctor can quickly and easily test to see if you have a color deficiency. Many specialists trained in eye diseases and disorders use a book containing several multicolored dot-pattern tests to provide a simple and accurate assessment of color vision deficiencies. If you don't have a color vision deficiency, you'll be able to pick out numbers and shapes from within the dot patterns. However, if you do have a color vision deficiency, either you'll find it difficult to see some patterns within the dots, or you won't see anything at all.
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