[The ocular components in anisometropia].

PURPOSE To asses the correlation between ocular components (axial length, anterior segment length, corneal power, vitreous length and equivalent power of the eye) and refractive error in eyes with higher and lower ametropia of subjects with anisometropia. METHODS An analytical survey was carried out in 68 patients with anisometropia of two or more diopters, assisted at the Ophthalmological Clinic from "Hospital das Clínicas da Faculdade de Medicina" of São Paulo University. All participants were submitted to ophthalmologic examination which included objective and subjective cycloplegic refratometry, keratometry and ultrasonic biometry. RESULTS No significant difference between measures of ocular components of the eyes with higher and lower ametropias was observed. The eyes with lower ametropia presented the same significant correlations observed in emmetropic eyes: of refraction with anterior segment length and axial length, and of the axial length with corneal power and vitreous length. The eyes with higher ametropia presented significant correlation of refraction with the axial length and of the axial length with vitreous length. Furthermore, we observed in both eyes, significant correlation of the power of the crystalline lens with the anterior chamber depth. CONCLUSION The eyes with lower ametropia presented correlations more frequently observed in emmetropia. The eyes with higher ametropia did not present the same correlations observed in emmetropic eyes.