Which test is used to measure the magnitude of a deviation by utilizing prisms during a Hirschberg test?

Which test is used to measure the magnitude of a deviation by utilizing prisms during a Hirschberg test?

• A. Krimsky test
• B. Bruckner test
• C. Bagolini
• D. Hirschberg

Answer: (A)

Estimating how far the eyes are misaligned by turning the Hirschberg reflex into a prism-based neutralization. In this approach, you first observe the corneal light reflex to get a sense of the deviation. Then you place a prism in front of the fixing eye and adjust its strength until the corneal reflex of the non-fixating eye lines up with the center of its pupil, meaning the visual axes are aligned. The amount of prism required, read in prism diopters, is the measured magnitude of the deviation. This method uses prisms to quantify how large the misalignment is, directly linking the Hirschberg reflex to a concrete, numeric measurement. Other tests serve different purposes: some screen or assess fusion and suppression, or rely on reflex brightness without prism neutralization, so they don’t provide this prism-based magnitude measurement during the Hirschberg assessment.

Estimating how far the eyes are misaligned by turning the Hirschberg reflex into a prism-based neutralization.

In this approach, you first observe the corneal light reflex to get a sense of the deviation. Then you place a prism in front of the fixing eye and adjust its strength until the corneal reflex of the non-fixating eye lines up with the center of its pupil, meaning the visual axes are aligned. The amount of prism required, read in prism diopters, is the measured magnitude of the deviation. This method uses prisms to quantify how large the misalignment is, directly linking the Hirschberg reflex to a concrete, numeric measurement.

Other tests serve different purposes: some screen or assess fusion and suppression, or rely on reflex brightness without prism neutralization, so they don’t provide this prism-based magnitude measurement during the Hirschberg assessment.