Anisometropic amblyopia occurs when there is a difference in refractive error between the two eyes.

• A. Anisometropic amblyopia
• B. Isometropic amblyopia
• C. Meridional amblyopia
• D. Torsional amblyopia

Answer: (A)

Anisometropia means the two eyes have different refractive powers, so each eye produces a differently focused image on the retina. During the critical period of visual development, the brain tends to rely on the clearer image and suppresses the blurrier one. If this disparity isn’t corrected early, the suppressed eye develops poor visual input, leading to amblyopia in that eye. This directly matches the statement: amblyopia arising when there is a difference in refractive error between the eyes. In contrast, isometropic amblyopia occurs when both eyes have similar high refractive errors and are blurred together, meridional amblyopia stems from astigmatism that blurs a specific meridian, and torsional amblyopia is not a standard, commonly described pattern.