Which test measures the alignment of the eyes by comparing them with a red light source?

The Krimsky test is specifically designed to assess eye alignment by utilizing a red light source. During the test, a red light is directed toward the patient’s eyes, and prism lenses are used to determine how much prism is needed to align the eyes on the light source. This is particularly effective for identifying strabismus, as it allows the examiner to measure the amount of deviation from proper alignment.

The other tests mentioned serve different purposes. The cover test is primarily used to detect heterophoria and strabismus by covering one eye to observe the movement of the uncovered eye. The Maddox rod test evaluates the presence of diplopia by using a series of rods that create a visual effect, and the phoria test measures the tendency for the eyes to deviate when fusion is disrupted. While all these tests are related to eye alignment and measurement, the Krimsky test uniquely uses the red light source to specifically compare the alignment directly.