Longitudinal Change and Stability of Refractive, Keratometric, and Internal Astigmatism in Childhood [Visual Psychophysics and Physiological Optics]

Conclusions. Cross-sectional data suggest the presence of a constant ATR contribution from internal astigmatism (0.60 D Cyl) that is close to the 0.50 D ATR constant reported by Javal and others. Highly astigmatic 3- to <11-year-old children and children older than age 11 years show a small (not clinically significant) increase in astigmatism with age. A negative correlation between changes in keratometric astigmatism and internal astigmatism suggests an active compensation that may contribute to the stability of astigmatism in Tohono O'odham children.
Source: Investigative Ophthalmology - Category: Opthalmology Authors: Tags: Visual Psychophysics and Physiological Optics Source Type: research