Which threshold is associated with isometropia hyperopia amblyogenic factor in BOTH eyes?

Which threshold is associated with isometropia hyperopia amblyogenic factor in BOTH eyes?

• A. +3.00D
• B. +5.00D
• C. +7.00D
• D. +6.00D

Answer: (B)

Bilateral isometropic hyperopia becomes an amblyogenic factor when both eyes have a high enough refractive error to blur images consistently during development. The threshold used for this is +5.00 diopters in both eyes. When both eyes are +5.00D or more, the visual input is sufficiently blurred in both eyes that normal neural development is disrupted, increasing the risk of bilateral amblyopia. Values lower than this would often be correctable enough by accommodation, and higher values would miss at-risk children, so +5.00D is the established cutoff for bilateral isometropic hyperopia amblyopia risk.

Bilateral isometropic hyperopia becomes an amblyogenic factor when both eyes have a high enough refractive error to blur images consistently during development. The threshold used for this is +5.00 diopters in both eyes. When both eyes are +5.00D or more, the visual input is sufficiently blurred in both eyes that normal neural development is disrupted, increasing the risk of bilateral amblyopia. Values lower than this would often be correctable enough by accommodation, and higher values would miss at-risk children, so +5.00D is the established cutoff for bilateral isometropic hyperopia amblyopia risk.