Open Filed Aberrometer Ofa-Osiris, Refractive Accuracy.
Published 2023 - 41st Congress of the ESCRS
Reference: FP11.08 | Type: Free paper | DOI: 10.82333/g74m-zg34
Authors: Marina Jose Martinez* 1 , Mario Cantó-Cerdán 1 , Antonio Martínez-Abad 1 , Pilar Yébana 1 , Ana B. Plaza-Puche 1 , Alejandra E. Rodriguez 1 , Francesco Versaci 2 , Jorge L. Alió 3
1Research and Development Department,Vissum Grupo Miranza,Alicante,Spain, 2CSO (Construzioni Strumenti Oftalmici),Firenze,Italy, 3Department of Cornea and Refractive Surgery,Vissum Grupo Miranza,Alicante,Spain;School of Medicine,Miguel Hernandez University,Alicante,Spain
Purpose
The aim of this study was to compare and to evaluate the agreement of the refractive measurements obtained by a new open field aberrometer OFA-Osiris (CSO), a conventional close field aberrometer Osiris (CSO) and the subjective refraction for the VEMoS project software validation.
Setting
Vissum Grupo Miranza, Alicante, Spain.
Methods
The study was composed by 35 eyes of 35 patients (mean age of 24.20±5.84 years) including healthy subjects not presenting ocular pathologies and accommodative alterations. They underwent a refractive procedure including a subjective refraction performed by an optometrist and ocular aberrometry performed by the Osiris aberrometer and OFA-Osiris. The sphere, cylinder, and spherical equivalent (SE) of three methods were collected and compared, as well as low-order-aberrations (LOA) and higher-order-aberrations (HOA) of both aberrometers. After checking the normality of the sample by Kolmogorov-Smirnov test, the comparison of parameters between all refractive methods was performed using the Paired T-test considering a significance level of 0.05
Results
The subjective refraction, showed a mean sphere of -0.61±2.61D, a mean negative cylinder of -0.38±0.45D and a mean SE of -0.80±2.56D. Measurements provided by OFA-Osiris did not show significant differences compared to subjective refraction (sphere -0.65±2.48D, p 0.653; cylinder -0.46±0.40D, p 0.189; SE -0.88±2.46D, p 0.378). However, Osiris showed more significant negative values compared to subjective refraction in terms of sphere and SE (sphere -1.15±2.55D, p<0.001; SE -1.42±2.51D, p<0.001). The mean LOA was significantly higher with Osiris compared to OFA-Osiris (3.09±2.22µm vs 2.62±2.08µm, p 0.002), being consistent with refractive differences. The mean HOA did not show significant differences between both devices (p 0.756).
Conclusions
The refractive measurements provided by a new open field aberrometry presented a suitable agreement with subjective refraction. Alternatively, the close field aberrometry provides more negative refractive values of around a half of diopter compared to subjective refraction. This may be related to the tonic accommodation induced by the close field format of the device.