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Clinical validation of the VAO adaptive optics visual simulator

Poster Details

First Author: L.Hervella Ginesta SPAIN

Co Author(s):    E. Villegas   J. Marin   P. Artal              

Abstract Details

Purpose:

To validate in the clinic the Adaptive Optics Visual Simulator VAO (Voptica SL, Murcia, Spain) for fast and accurate refraction estimates.

Setting:

Laboratory of Clinical Optics, University of Murcia, Spain.

Methods:

VAO combines optical measurements and visual testing within the same compact instrument. It incorporates a Hartmann-Shack wave-front sensor to measure objective refraction and aberrations, together with a spatial light modulator capable of correcting or inducing any optical profile while performing visual testing. In seventy-four eyes of 37 subjects, subjective refraction (SR) was measured using VAO. The agreement of spherical equivalent (M) and cross cylinders (J0 and J45) with a standard refraction technique was estimated using different statistic parameters: 95% confidence limits (CL), Student�Â�´s t- test or Wilcoxon Rank Sum and Pearson correlation coefficient(r).

Results:

There is a high correlation between the elements of SR (M, J0 and J45) measured with VAO and the standard technique (r�â�‰�¥0.92) and the differences are not significant different (p>0.05). The 95% CL of M, J0 and J45 were �Â�±0.38, �Â�±0.07 and �Â�±0.07 D respectively. The reproducibility of SR measurements between two examiners had an excellent correlation (r�â�‰�¥0.93) and there were not significant differences between them (p>0.05). The 95% CL of M, J0 and J45 were �Â�±0.29, �Â�±0.08 and �Â�±0.07 D respectively.

Conclusions:

Refraction results using the VAO adaptive optics visual simulator were in agreement with those obtained in a standard technique while offering significant advantages in terms of time and clinic space. VAO is a new instrument that offers significant advantages in the optical and visual assessment of cataract and refractive surgery patients.

Financial Disclosure:

research is funded, fully or partially, by a competing company

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