Official ESCRS | European Society of Cataract & Refractive Surgeons


Evaluation of induced higher-order aberrations (HOAs) in individuals with moderate myopia and moderate myopic astigmatism in corneal wavefront-guided trans-epithelial PRK by Smart Pulse technology

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Session Details

Session Title: LASIK & PRK II

Session Date/Time: Monday 16/09/2019 | 14:00-16:00

Paper Time: 15:12

Venue: Free Paper Forum: Podium 3

First Author: : K.Doctor INDIA

Co Author(s): :    S. Krishnamurthy   A. Kulkarni                          

Abstract Details


To evaluate change in total higher order aberrations (HOAs) after trans PRK for moderate myopic andmoderate myopic astigmatismpatients.


Private Practice


This retrospective analytical study.The main focus was on coma,trefoiland spherical aberrations as these were the most significant components of HOAs. 46 eyes of 26 patients with age ranging from 18-40 years were included in the study with refractive error ranging from 3D to 6D and astigmatism ranging from 1D to 2 D. RMS value of total HOAs was used for quantitative assessment of HOA. Pre-operative and 6 months post-operative RMS values were considered for study to find change in HOA.


Age of the patients ranged from 18 years to 40 years with mean age of 29 ±11 years. 20 (43.47%) were males and 26 (56.52%) were females. Mean RMS value of HOAs, coma and spherical aberrations, trefoil was calculated both pre operatively as well as 6 months post operatively. Corneal total root mean square higher-order aberrations and corneal spherical aberrations decreased postoperatively; however, the change was not significant . Corneal coma and trefoil showed a marginal decrease postoperatively.


Corneal wavefront guided Trans Epithelial PRK by Smart pulse technology is an effective for correcting moderate myopic astigmatism and provides fewer induced corneal aberrations

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