Which test is performed to assess a patient’s color perception?

The Ishihara test is specifically designed to assess a patient’s color perception, particularly the ability to distinguish between different colors. This test typically includes a series of colored plates with numbers or shapes embedded within patterns of dots. Individuals with normal color vision can easily identify the numbers or shapes, while those with color vision deficiencies may struggle or be unable to see them at all.

In contrast, keratometry measures the curvature of the cornea, visual acuity testing assesses clarity of vision, and ophthalmoscopy examines the interior structures of the eye, none of which are focused on color perception. The Ishihara test is thus uniquely suited to determining a person's ability to perceive colors, making it the correct choice for this question.