Corneal aberrations andanisometropia in children

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Anisometropia, a condition with unequal refractive errors between eyes, is common in children.
• Previous studies suggest similar ocular higher-order aberrations (HOAs) between eyes in anisometropia.
• The similarity of binocular corneal HOAs in anisometropic children remains unclear.

Purpose of the Study:

• To compare interocular differences in corneal HOAs in children with low and high anisometropia.
• To investigate correlations between corneal HOAs and the degree of anisometropia.
• To analyze differences in coma and spherical aberration between eyes.

Main Methods:

• A retrospective, self-controlled study involving 69 children with myopic anisometropia.
• Participants were categorized into low (1D-2D difference) and high (≥2D difference) anisometropia groups.
• Corneal aberrations were measured using a Sirius topographer; data analyzed with paired t-tests and Spearman correlation.

Main Results:

• No significant interocular differences in corneal HOAs were found in the low anisometropia group.
• In the high anisometropia group, eyes with higher myopia had less coma (3mm diameter) than contralateral eyes.
• No interocular differences in total corneal HOAs or spherical aberrations were observed; coma differences did not correlate with anisometropia degree.

Conclusions:

• Children with high anisometropia exhibit differences in corneal coma between eyes.
• No significant correlation exists between interocular coma differences and the degree of anisometropia.
• Findings contribute to understanding binocular visual development in anisometropia.