American Board of Opticianry (ABO) Practice Test

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Prepare for the ABO (American Board of Opticianry) Test with interactive flashcards and hundreds of multiple choice questions. Updated for 2024 to help you excel on exam day

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How is hypophoria typically corrected?

A. With base down prism
B. With base up prism
C. With base-in prism
D. With base-out prism

The correct answer is: B. With base up prism

Hypophoria is a condition where one of the eyes is lower in position than the other eye when looking at a distant object. This can cause visual discomfort and can also affect depth perception. It is typically corrected with base up prism, which helps to align the eyes at the same level and improve visual clarity. The other options, such as base down, base-in, and base-out prism, are not effective in correcting hypophoria. Base down prism would only make the eyes look even more asymmetrical, while base-in and base-out prism are more commonly used to correct convergence or divergence issues. Therefore, base up prism is the most appropriate choice for correcting hypophoria.