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Incidence of rainbow glare after 200 KHz femtosecond laser-assisted LASIK

Poster Details

First Author: M.Taechajongjintana THAILAND

Co Author(s):    N. Wongpitoonpiya   J. Supokawate   M. Chongchareon   J. Duangpatra           

Abstract Details


To report the incidence of rainbow glare following 200 KHz femtosecond laser-assisted laser in situ keratomileusis (femto-LASIK).


LASIK Center, Ophthalmology Department, Bangkok Metropolitan Administration General Hospital (Klang Hospital), Bangkok, Thailand.


From January 2016 to December 2016, patients undergone femto-LASIK were consecutively enrolled. Flap creation was performed with the Wavelight FS-200 (Alcon Laboratories, Inc., Fort Worth, TX). Femtosecond laser settings included raster scan pattern, spot/line separation 6.0/6.0 um, pulse repetition rate 200 KHz, pulse energy 0.6 uJ, and flap thickness 110 um. Questions about post-operative rainbow glare (seeing a spectrum of coloured bands radiating from a white-light source when viewed in a dark environment) and its characteristics (number of coloured bands, onset and duration) were asked during follow-up appointments or by telephone calls.


A total of 865 patients (1723 eyes) were enrolled. Forty-nine patients (5.66%) experienced post-operative rainbow glare, which had onset within the first week and duration of the symptom range from 1 week to 6 months. All of the patients had neither visual loss nor persistent rainbow glare. Rainbow glare was reported as 6 or more coloured bands, mostly 8 bands.


Rainbow glare is an uncommon optical side effect of femto-LASIK. Although self-limiting, it affects quality of life for a significant period of time. Further study are required to find the most suitable laser parameters, which can prevent the occurrence of rainbow glare.

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