Answer :
Final answer:
The Ishihara test is the primary method for diagnosing color blindness by assessing whether individuals can identify numbers within colored dot patterns. This test effectively reveals color perception deficiencies, especially red-green color blindness, which is more common in males due to X-linked inheritance. Other tests, like Snellen and Jaeger, focus on visual acuity rather than color vision.
Explanation:
Which Test is Used to Determine Color Blindness?
The Ishihara test is the standard test used to determine whether a person has color blindness. It evaluates color perception by assessing whether individuals can discern numbers that appear in a circle of dots of varying colors and sizes. For example, a person with normal color vision can see numbers like '74' within the colored dots, while someone with red-green color blindness might not see these numbers at all.
This condition predominantly affects men due to the genetic inheritance pattern linked to the X chromosome. A mutation in the genes associated with red and green photoreceptors can lead to difficulties in distinguishing between these colors, which makes the Ishihara test particularly effective in identifying such deficiencies.
Other Tests and Their Purposes
Other options listed, such as the Snellen test and Jaeger test, are primarily used to assess visual acuity and reading vision, respectively, rather than color perception. The Fluorescein test is utilized in eye care to examine the cornea and detect issues like abrasions or foreign bodies.
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