When one eye is hyperopic and the other eye is myopic, the ametropia is referred to as _____________.

When one eye is hyperopic and the other eye is myopic, the ametropia is referred to as _____________.

• A. Anisometropia
• B. Antimetropia
• C. Aniseikonia
• D. Astigmatism

Answer: (B)

When the two eyes have opposite signs in their refractive errors, one eye being hyperopic and the other myopic, the situation is called antimetropia. This is a specific form of anisometropia, where the difference between the eyes is not just a matter of unequal power, but the powers have opposite signs (plus in one eye, minus in the other). Understanding this helps distinguish it from general anisometropia, where the eyes simply differ in refractive strength but not necessarily with opposite signs. Aniseikonia is about perceived image size differences, which can accompany unequal refractive errors but is not the ametropia itself, and astigmatism refers to refractive error due to unequal powers across meridians, not the interocular sign difference.

When the two eyes have opposite signs in their refractive errors, one eye being hyperopic and the other myopic, the situation is called antimetropia. This is a specific form of anisometropia, where the difference between the eyes is not just a matter of unequal power, but the powers have opposite signs (plus in one eye, minus in the other). Understanding this helps distinguish it from general anisometropia, where the eyes simply differ in refractive strength but not necessarily with opposite signs. Aniseikonia is about perceived image size differences, which can accompany unequal refractive errors but is not the ametropia itself, and astigmatism refers to refractive error due to unequal powers across meridians, not the interocular sign difference.