Corneal Irregular Astigmatism And Visual Function On Anterior Segment Optical Coherence Tomography In TGFBI Corneal Dystrophy

The purpose of this study was to evaluate corneal irregular astigmatism of patients with granular and lattice corneal dystrophy (GCD and LCD). 70 GCD, 35 LCD, and 23 control eyes were included. Anterior and posterior corneal topographic data obtained from anterior segment optical coherence tomography were expanded into four components via Fourier harmonic analysis. These components were compared with healthy eyes and the association between each component and best-corrected visual acuity (BCVA) was investigated. Anterior and posterior components increased in LCD eyes, but none increased in GCD. Posterior components of GCD type 2 (GCD2), anterior and posterior of LCD type 1 (LCD1), posterior of LCD type IIIA (LCD 3A) and type IV (LCD4) significantly increased. BCVA was significantly associated with anterior and posterior components in LCD eyes but not in GCD. The anterior components of LCD1, anterior and posterior of LCD3A, and posterior of LCD4, but not the posterior of LCD3A, were positively correlated with BCVA. As conclusions, in GCD eyes, none of the components differed from those of the control and BCVA was not significantly associated with them. In LCD eyes, the anterior and posterior components increased, and BCVA was significantly associated with the anterior and posterior components.