THE ACCURACY OF SELF-ADJUSTABLE ADLENS AGAINST THE AUTO REFRACTOR RESULTS AND THE EFFECTS OF THESE SPECTACLES ON THE BINOCULAR VISION

Abstract

Adlens adjustable eyeglasses are constructed for use as a short term or supplementary pair of glasses. The power of the lenses can be adjusted from -6 to +3 diopters. There were 25 subjects aged between 18 to 35 years. All the participants had refractive errors were between the range of -6 to +3 D. There was no history of any ocular disease in any of the participants. The maximum amount of astigmatism in all the participants was not more than 2 D. Visual acuity was recorded binocularly and monocularly for both eyes. Phoria was measured using Maddox rod for distance and near and fixation disparity was also tested. Autorefraction based prescription was set in a trial frame and visual acuity and binocular tests were carried out in the same way. All the examinations were done randomly and the power of Adlens was assessed using a focimeter. The MSE for the right eye with both methods of refraction had a mean difference of -0.01 with standard deviation of ±0.46. The MSE for the left eye was -0.22 with standard deviation of ±0.43. The mean difference for J0 right eye was -0.03 with ±0.44 SD. The mean difference for J0 left eye was 0.04 with ±0.18 SD. The mean difference of J45 for right eye was -0.14 with ±0.17 SD. J45 left eye mean difference was 0.23 with ±0.19 SD. Similarly, binocular visual acuity mean difference was 0.06 with ±0.07 SD. Mean difference in VA for right eye was 0.05 with ±0.07 SD and for left eye mean difference was 0 and ±0.08 SD. Bland Altman plots were created for all the variables regarding the two methods of refraction with 95% confidence interval.

Keywords: Self-adjustable Adlens, binocular vision, auto refractor