Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


escrs app advert yo advert

The influence of ablation depth and optical zone on the postoperative contrast sensitivity in LASIK for myopia

Search Title by author or title

Session Details

Session Title: Presented Poster Session: Laser Refractive Surgery (Lasers/LASIK/Epi-LASIK)

Session Date/Time: Sunday 11/09/2016 | 09:30-11:00

Paper Time: 10:30

Venue: Poster Village: Pod 2

First Author: : T.Yonekawa JAPAN

Co Author(s): :    S. Tamaoki   K. Shimamoto   H. Uozato   T. Hatada   K. Inoue   T. Tsuru

Abstract Details


The contrast sensitivity (CS) has been reported to decrease after laser in situ keratomileusis (LASIK). We reported the influence of optical zone (OZ) on the postoperative CS after LASIK for high myopia (Yonekawa et al, ESCRS 2015). In this retrospective study, we investigate the influence of OZ on postoperative CS and uncorrected visual acuity (UCVA) in similar ablation depths (less than 80μm) in LASIK.


Inouye Eye Hospital, Tokyo, JAPAN


The subjects were 36 eyes of 22 patients who underwent LASIK at our hospital. They were divided into 2 groups according to OZ: 6.5 mm group (24 eyes, mean age: 36.4years old, mean spherical equivalent (SE) : -4.56±0.56D) and 6.0 mm group (12 eyes, mean age: 34.9 years old, mean SE: -4.97±1.08D). Target refractive correction was emmetropia in all cases. The CS was measured with a contrast-glare tester (CGT-2000™: TAKAGI, JAPAN). The Area Under the Log Contrast Sensitivity Function (AULCSF) was determined CGT-2000. AULCSF and mean UCVA were analyzed statistically between the 2 groups (Mann–Whitney U Test).


1. There was no significant difference in the age, SE, or ablation depth between the 2 groups (P>0.0500). 2. At 3 months postoperatively, there was no significant difference in AULCSF between the 2 groups in CS (P>0.0500). However, the postoperative CS with glare was improved in high frequency (11.16 c/d) significantly in 6.0 mm group (P=0.0143). 3. UCVA (Log MAR) was -0.17±0.04 in 6.5mm group, and -0.15±0.06 in 6.0mm group, respectively. There was no difference between the 2 groups (P=0.1893).


The CS is not significantly affected by LASIK with ablation depth less than 80 μm in either OZ 6.0 mm or 6.5 mm.

Financial Disclosure:


Back to previous