Tilte (Eğik) Disk Sendromunda Kırılma Kusuru ve Optik Biyometri Özellikleri

Abstract

Evaluation and comparison of optical biometry parametres of patients with tilted disc to myopia cases to elucidate the origin of astigmatism. Upon fundoscopic examination 22 right eyes with tilted disc (Group 1) and 21 right eyes with a refractive error of ≥-0,75 (Diopters=D) (Group 2), who were diagnosed between 2014 and 2016 were included. Refraction and optical biometry measurements were obtained and compared 30 minutes after instilling %1 cyclopentholate. The mean age (years) of Group 1 was 41.5±17.6, while it was 26.2±7.8 in group 2. The mean spherical equivalent (D) was -5.10±3.72 in group 1, and -2.81±3.29 in group 2 (p=0.047). The mean cylindrical power (D) was -2.43±1.96 in group 1, and -0.63±0.67 in group 2 (p=0.001). The best corrected visual accuities (logMAR) were significantly lower in group 1 (p=0.001). The mean axial length of group 1 was 25.96±1.47 mm, while in group 2 it was 24.56±1.51 mm (p=0.001). There were no significant differences between two groups regarding lens thickness, anterior chamber depth and keratometry values. The mean keratometric values (D) were; K1: 42.60±1.93 in group 1 and 43.03±1.56 in group 2; K2: 44.46±2.14 in group 1 and 44.03±1,54 in group 2. The mean central corneal thickness (micron) were significantly lower in group 1; 523.82±25.90 (group 1) and 552.10±36.76 (group2) (p=0.006). Considering the fact that the difference between the keratometric values among groups was not significant, we concluded that the link between astigmatism and tilted disc could be due to lenticular and/or retinal changes.