Suppression is neural inhibition of one eye's image to avoid diplopia; which statement best describes how it is detected clinically?

Suppression is neural inhibition of one eye's image to avoid diplopia; which statement best describes how it is detected clinically?

• A. Suppression is a neural inhibition of one eye's image to avoid diplopia; detected with Worth 4-Dot, Bagolini, and similar tests.
• B. Suppression is a misalignment of the eyes that causes constant diplopia.
• C. Suppression is the brain disregarding depth cues in stereopsis.
• D. Suppression is retinal detachment sensation.

Answer: (A)

Suppression is the brain’s way of inhibiting input from one eye to prevent double vision, so clinically we look for tests that reveal whether both eyes are contributing to what the patient sees. In Worth 4-Dot, the patient wears red-green glasses and the test presents colored dots; by noting which dots are seen, the clinician can tell if one eye’s image is being suppressed because the pattern of seen versus unseen dots reflects which eye is contributing. In Bagolini, the patient looks at two faint lines produced by special lenses; when both eyes are contributing, a single fused line is reported, but if one eye is suppressed, only one line (or an abnormal percept) is seen. These tests specifically show whether both eyes are providing input, which is what suppression is about. The other statements describe different issues (misalignment causing constant diplopia, reliance on depth cues, or unrelated retinal sensations) and do not capture how suppression is detected with these binocular fusion tests.

Suppression is the brain’s way of inhibiting input from one eye to prevent double vision, so clinically we look for tests that reveal whether both eyes are contributing to what the patient sees. In Worth 4-Dot, the patient wears red-green glasses and the test presents colored dots; by noting which dots are seen, the clinician can tell if one eye’s image is being suppressed because the pattern of seen versus unseen dots reflects which eye is contributing. In Bagolini, the patient looks at two faint lines produced by special lenses; when both eyes are contributing, a single fused line is reported, but if one eye is suppressed, only one line (or an abnormal percept) is seen. These tests specifically show whether both eyes are providing input, which is what suppression is about. The other statements describe different issues (misalignment causing constant diplopia, reliance on depth cues, or unrelated retinal sensations) and do not capture how suppression is detected with these binocular fusion tests.