Danilo A Jesus1, Renata Kedzia2, D Robert Iskander2. 1. Department of Biomedical Engineering, Wroclaw University of Science and Technology, Poland. Electronic address: danilo.jesus@pwr.edu.pl. 2. Department of Biomedical Engineering, Wroclaw University of Science and Technology, Poland.
Abstract
PURPOSE: To develop a new and precise methodology to measure the scleral radius based on anterior eye surface. METHODS: Eye Surface Profiler (ESP, Eaglet-Eye, Netherlands) was used to acquire the anterior eye surface of 23 emmetropic subjects aged 28.1±6.6years (mean±standard deviation) ranging from 20 to 45. Scleral radius was obtained based on the approximation of the topographical scleral data to a sphere using least squares fitting and considering the axial length as a reference point. To better understand the role of scleral radius in ocular biometry, measurements of corneal radius, central corneal thickness, anterior chamber depth and white-to-white corneal diameter were acquired with IOLMaster 700 (Carl Zeiss Meditec AG, Jena, Germany). RESULTS: The estimated scleral radius (11.2±0.3mm) was shown to be highly precise with a coefficient of variation of 0.4%. A statistically significant correlation between axial length and scleral radius (R2=0.957, p<0.001) was observed. Moreover, corneal radius (R2=0.420, p<0.001), anterior chamber depth (R2=0.141, p=0.039) and white-to-white corneal diameter (R2=0.146, p=0.036) have also shown statistically significant correlations with the scleral radius. Lastly, no correlation was observed comparing scleral radius to the central corneal thickness (R2=0.047, p=0.161). CONCLUSIONS: Three-dimensional topography of anterior eye acquired with Eye Surface Profiler together with a given estimate of the axial length, can be used to calculate the scleral radius with high precision.
PURPOSE: To develop a new and precise methodology to measure the scleral radius based on anterior eye surface. METHODS: Eye Surface Profiler (ESP, Eaglet-Eye, Netherlands) was used to acquire the anterior eye surface of 23 emmetropic subjects aged 28.1±6.6years (mean±standard deviation) ranging from 20 to 45. Scleral radius was obtained based on the approximation of the topographical scleral data to a sphere using least squares fitting and considering the axial length as a reference point. To better understand the role of scleral radius in ocular biometry, measurements of corneal radius, central corneal thickness, anterior chamber depth and white-to-white corneal diameter were acquired with IOLMaster 700 (Carl Zeiss Meditec AG, Jena, Germany). RESULTS: The estimated scleral radius (11.2±0.3mm) was shown to be highly precise with a coefficient of variation of 0.4%. A statistically significant correlation between axial length and scleral radius (R2=0.957, p<0.001) was observed. Moreover, corneal radius (R2=0.420, p<0.001), anterior chamber depth (R2=0.141, p=0.039) and white-to-white corneal diameter (R2=0.146, p=0.036) have also shown statistically significant correlations with the scleral radius. Lastly, no correlation was observed comparing scleral radius to the central corneal thickness (R2=0.047, p=0.161). CONCLUSIONS: Three-dimensional topography of anterior eye acquired with Eye Surface Profiler together with a given estimate of the axial length, can be used to calculate the scleral radius with high precision.
Authors: Dong Zhou; Ahmed Abass; Ashkan Eliasy; Harald P Studer; Alexander Movchan; Natalia Movchan; Ahmed Elsheikh Journal: J R Soc Interface Date: 2019-05-31 Impact factor: 4.118
Authors: Vivek Suganthan Ramasubramanian; S Meenatchi Sundaram; Rinu Thomas; S Ve Ramesh; B Raghuvir Pai; Manali Hazarika; Shah Mohammed Abdul Khader; Rakshath G Poojary; H Girish; Vernon Seth Crasto Journal: J Ophthalmol Date: 2022-05-17 Impact factor: 1.974
Authors: Dong Zhou; Ahmed Abass; Ashkan Eliasy; Alexander Movchan; Natalia Movchan; Ahmed Elsheikh Journal: Int J Environ Res Public Health Date: 2019-09-06 Impact factor: 3.390