Correct! If you place a single or multiple pinhole occluder in front of each eye and discover that visual acuity markedly improves, you have assigned the problem to the optical segment. It may be an uncorrected refractive error or a defect in the cornea or lens that interferes with the formation of a point focus on the fovea. If visual acuity does not substantially improve with the pinhole test, then the problem lies in the retinocortical segment or the patient is unable or unwilling to cooperate with the pinhole test, providing a “false negative” result. If you do not have a pinhole occluder, make one by puncturing one or more millimeter holes in a piece of paper (more holes is better). Proper pupil, visual field, and ophthalmoscopic examinations provide a lot of information, but are not as well suited as the simple pinhole examination in solving this issue.

Incorrect

Incorrect

Incorrect