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SAVER study simulation by adaptive optics for vision experiment and treatment in presbyopia

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Session Details

Session Title: LASIK and Imaging

Session Date/Time: Tuesday 10/10/2017 | 14:00-15:20

Paper Time: 14:12

Venue: Room 4.1

First Author: : T.Grover INDIA

Co Author(s): :    R. Shetty   A. Sinha   S. Kochar   P. Kusumgar           

Abstract Details


To evaluate distance, intermediate and near vision in presbyopic patients with an adaptive optics (AO) simulator by modifying spherical aberration (SA).


Narayana Nethralaya Postgraduate Eye Institute and Superspeciality Hospital, Bangalore, India


Visual AO (VAO) aberrometer (VOptica Inc., Spain) was used to measure ocular wavefront aberrations in presbyopic patients (n=100). VAO also has in built liquid crystal sensor to modify the ocular aberrations virtually and perform function vision test on presbyopic eyes. By changing SA over the natural aberrations of the eye, the change in uncorrected distance, intermediate (80 cm) and near (40 cm) visual acuity (VA) was noted in decimals. Refractive error was also measured with VAO. Induced change in SA was converted to required hyperopic ablation for possible surgical modification.


In presbyopic eyes, induction of added negative SA resulted in improvement of near and intermediate VA but distance VA reduced simultaneously. Median VA improved by 0.1 decimal in intermediate and near vision while distance VA reduced -0.15 decimal (p<0.0002). Desired change in SA was selected by optimizing the improvement in near and intermediate vision while maintaining distance VA. Nearly half of the eyes required a hyperopic spherical correction of 1D or more to improve the near and intermediate vision. The remaining needed 1D or less. Overall, each eye was unique.


VAO provided patient-specific measurements of aberrations and its subsequent modification to improve near and intermediate VA. This methodology can help in customization of presbyopia treatment with laser ablation.

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