The image associated with the question indicates a test that is commonly used in the field of ophthalmology. The test in question could involve methods such as cover tests or alternating cover tests. These tests are used primarily to diagnose two specific ocular conditions:
- Strabismus: A condition where the eyes do not properly align with each other when looking at an object. This misalignment is evident during cover tests, making such tests crucial for its diagnosis.
- Heterophoria: A latent deviation of the eyes that becomes apparent only when binocular vision is disrupted, for example by covering one eye. The heterophoria is diagnosed through similar procedures, particularly when the occlusive cover test is used.
Given that the techniques for diagnosing Strabismus and Heterophoria are often overlapping and the cover test or related variants are employed for both conditions, the correct answer to the question is
Both A & B.