Which term refers to eye turning only when binocular viewing is broken and two eyes are no longer looking at the same object?

• A. Phoric
• B. Trophic
• C. Residual vision
• D. Braille embosser

Answer: (A)

The concept here is a latent eye misalignment that only shows up when binocular viewing is disrupted. When both eyes normally try to focus together, they stay aligned; but if fusion is broken—for example, when one eye is covered—the eyes may drift to a new position. This kind of deviation is called a phoric deviation, and the adjective form describes the condition as phoric. In practice, a phoria is a latent misalignment detected with dissociation tests, unlike a tropia, which is a manifest misalignment present even when both eyes are viewing the same object. The other terms listed don’t fit this situation: trophic relates to nourishment, residual vision means remaining functional sight, and a braille embosser is a device for producing braille.