The effect of axial length and refraction on corneal topographic parameters in school children

Session Details

Session Title: Paediatric Ophthalmology & Other Topics

Session Date/Time: Tuesday 25/09/2018 | 08:00-10:30

Paper Time: 08:00

Venue: Room A3, Podium 2

First Author: : B.Bayraktutar TURKEY

Co Author(s): :    A. Yildiz Tas   O. Muftuoglu   H. Basmak   A. Sahin           

Abstract Details

Purpose:

To report normative OrbscanII corneal topography values and to find out the effect of axial length and refraction on topographic parameters in healthy school children.

Setting:

Koç University Hospital, İstanbul, Turkey

Methods:

One thousand three hundred ninety four eyes of 697 healthy children who were between 7 and 15 years old were included in this study. All study participants were underwent detailed ophthalmologic examination including cycloplegic refraction, A-scan biometry and corneal topography measurements (OrbscanII, Bausch & Lomb, US). Correlation analyses between age, refractive error, axial length and simulated K1(SimK1), Simulated K2 (SimK2), total refractive power 3mm and 5 mm (PWR-3 and PWR-5), anterior best fit sphere (Abfs), posterior best fit sphere (Pbfs), anterior elevation, posterior elevation, central corneal thickness (CCT) were performed by SPSS 22.0 (IBM Co., CA) program.

Results:

Three hundred-thirty eight girls (48%) and 359 boys (52%) were included in the study. The mean age of the girls and boys were 10.2±2.3 and 10.5±2.2 years old (=0.04), respectively. Age was correlated with spherical error (r:-0.151, p<0.001), cylindirical error (r:-0.152, p<0.001), axial length (r:0.202, p<0.001) and PWR-3 (r:-0.082, p=0.03). There were correlations between axial length and Abfs (r:-0.186, p<0.001), Pbfs (r:-0.173, p<0.001), SimK1 (r:-0.180, p<0.001), Sim K2 (r:-0.188, p<0.001), PWR-3 (r:-0.231, p<0.001). Cylindirical error was weakly correlated with Abfs (r:-0.071, p=0.01).

Conclusions:

Age, refractive error and axial length have a potential effect on corneal topography in children. Recently, corneal collagen crosslinking and refractive surgery procedures began to find place in childhood; therefore normative values of corneal topography in children and effect of age, refractive error and axial length on these values became more valuable.

Financial Disclosure:

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