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A fifteen year evaluation of keratometric, refractive, and visual outcomes in laser in situ keratomileusis for high myopia

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Session Details

Session Title: LASIK I

Session Date/Time: Sunday 23/09/2018 | 14:00-16:00

Paper Time: 14:00

Venue: Room A3, Podium 2

First Author: : D.Mathur INDIA

Co Author(s): :    N. Shroff   R. Dutta   K. Kumar              

Abstract Details


To evaluate long term outcomes of Laser in Situ Keratomileusis for high myopia with and without astigmatism, to analyze predictors of regression, and review complications.


Cornea & Refractive Service, Shroff Eye Centre, A-9, Kailash Colony, New Delhi - 110048, India.


105 eyes of 62 patients with a mean age of 44.3±2.37 years underwent laser in situ keratomileusis for myopia ranging from -5.75 to -11.75 D sphere. All patients had a minimum 15 year follow up. At 15 years the main outcome measures were UDVA, CDVA, predictability, manifest refractive errors, corneal topography, complications and re-treatment rates. Contrast sensitivity, and wavefront aberrometry were also recorded, and patient satisfaction questionnaires were also implemented.


The UDVA at 15 years was 20/20 or better in 58.1% eyes and 20/40 or better in 79% eyes. The safety-index was 1.07 and efficacy-index was 0.98. There was a significant dioptric increase in keratometric variables (p<.05) with maximum increase between 3 and 18 months. 65.71% eyes were within ±1.00 diopter of the attempted spherical equivalent and 81.9% within ±2.00 diopters. The post-operative CDVA was significantly better than preoperatively (p<.001). Post-operative complications were minor with 10 eyes (9.5%) requiring retreatment, and 2 eyes developing ectasia. Predictors for regression were RSB, pre-operative pachymetry and percentage of tissue depth altered.


Laser in Situ Keratomileusis for high myopia is safe and effective over a long term period with preserved corneal integrity. However, a significant myopic regression occurs over time. The average Quality of Vision value improved with high patient satisfaction.

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