#unequal vision
- Anisometropia — An ocular refractive error characterized by a significant difference in optical power between the two eyes. Clinically, this structural phenomenon manifests when one eye has a different focus than the other (for instance, one eye is myopic and the other is hyperopic or emmetropic), forcing the brain to process images of unequal size and clarity, which can lead to visual fatigue, strabismus, or amblyopia.
- Anisopia — Inequality of visual power or structural difference in light perception capacity and clarity between the two eyes; a state in which bilateral visual acuity is not identical. This clinical phenomenon can be caused by asymmetric refractive errors, retinal anomalies, or optic pathway disorders, preventing the achievement of perfect binocular fusion at the brain level.