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

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

Purpose:

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.

Setting:

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

Methods:

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.

Results:

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.

Conclusions:

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.

Financial Disclosure:

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