Final answer:
The Ishihara test is used to evaluate color perception by assessing an individual's ability to discern numbers within dots of varying colors and sizes.
Step-by-step explanation:
The Ishihara test is used to evaluate color perception. In this test, the patient is instructed to read plates that have dots of varying colors and sizes arranged in a circle. The objective is to determine if the individual can discern numbers within the dots. The test is conducted with both eyes open, allowing for a more accurate assessment of color perception.