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Wavefront optimized Femto-LASIK: evaluating corneal higher order aberrations

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Session Details

Session Title: LASIK I

Session Date/Time: Sunday 06/09/2015 | 08:00-10:00

Paper Time: 08:18

Venue: Room 11

First Author: : S.Vasavada INDIA

Co Author(s): :    A. Vasavada   V. Vasavada   V. Vasavada   S. Srivastava           

Abstract Details


To report the visual outcomes and change in corneal aberration in Indian eyes treated using the FS200 laser (Alcon Laboratories Inc).


Iladevi Cataract & IOL Research Centre and RAghudeep Eye Hospital, India


Prospective, observational series included 72 eyes with myopia, myopic astigmatism or pure astigmatism (spherical equivalent -0.75 to -9.37 D), undergoing Wavefront-Optimized Femto-LASIK using the EX500 (Alcon Laboratories Inc) and FS200 lasers. Pre- and 3 month postoperative uncorrected distance visual acuity (UDVA) and higher-order aberrations (HOAs), as measured on the I-Trace aberrometer (Tracey Technologies, USA) were compared.


At 3 months, 89% of eyes had a UDVA of 20/25 or better and 98% had 20/30 or better. All eyes had a postoperative CDVA of 20/25 or better. An increase was found in mean spherical aberration of 0.22+0.27 microns(P=0.01) at a 6 mm pupil. However, when measured at the physiologic mesopic pupil size there was a slight decrease of -0.01+0.03 microns(P=0.19) in mean spherical aberrations. An increase in coma was noted of 0.03+0.05 microns(P=0.004).An increase was found in total higher order aberrations of 0.04 +/- 0.06 microns (P =0.004)


Wavefront-optimized Femto-LASIK with the EX500 and FS200 lasers achieved excellent postoperative UDVA outcomes, with no significant induction of spherical aberration at mesopic pupil size

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