Which test is uniquely emphasized for accommodative testing, not seen in BV testing?

Which test is uniquely emphasized for accommodative testing, not seen in BV testing?

• A. Amplitudes
• B. Near and Distance CT
• C. NPC
• D. Prism Facility

Answer: (A)

The ability to focus up close is an accommodative function, so the test that directly measures how much focusing power the eye can exert is amplitude testing. This test quantifies the range of accommodation in diopters—from the relaxed state to the near point—and is used to assess accommodative reserve and function. It stands apart from binocular vision testing, which centers on how the eyes work together to maintain alignment and single vision. In BV testing you typically perform cover tests to gauge ocular alignment, NPC to evaluate convergence break/near point, and prism facility to probe fusional (vergence) ranges. These assess how the eyes vergence and align rather than how much focusing power the eye can generate. So amplitude testing is unique to accommodation, whereas the others focus on vergence and motor alignment.

The ability to focus up close is an accommodative function, so the test that directly measures how much focusing power the eye can exert is amplitude testing. This test quantifies the range of accommodation in diopters—from the relaxed state to the near point—and is used to assess accommodative reserve and function. It stands apart from binocular vision testing, which centers on how the eyes work together to maintain alignment and single vision. In BV testing you typically perform cover tests to gauge ocular alignment, NPC to evaluate convergence break/near point, and prism facility to probe fusional (vergence) ranges. These assess how the eyes vergence and align rather than how much focusing power the eye can generate. So amplitude testing is unique to accommodation, whereas the others focus on vergence and motor alignment.