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Disk halo size after small incision lenticule extraction

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Session Details

Session Title: LASIK I

Session Date/Time: Sunday 23/09/2018 | 14:00-16:00

Paper Time: 15:32

Venue: Room A3, Podium 2

First Author: : T.Han CHINA

Co Author(s): :    F. Zhao   X. Chen   X. Zhou              

Abstract Details


To investigate objective disk halo size produced by a glare source changes after small incision lenticule extraction (SMILE) for myopia correction.


Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai


Prospective clinical study included 45 right eyes of 45 patients with a mean age of 25.40 ± 5.06 years and mean spherical equivalent (SE) of -6.08 ± 1.90 diopters. Disk halo size was measured with a vision monitor before surgery, at postoperative 1 week and 3 months. Other information was also collected including age, SE, lenticule thickness, lenticule diameter, dark pupil and pupillary response to light parameters (initial diameter, amplitude of contraction, latency of contraction, duration of contraction, velocity of contraction, latency of dilation, duration of dilation, velocity of dilation, maximum pupil, minimum pupil, and average pupil).


Compared to preoperative values, disk halo size increased significantly at postoperative 1 week (P=0.026), and returned at postoperative 3 months (P>0.05). Preoperative disk halo size was significantly correlated with SE (r=-0.346, P=0.020), minimum pupil (r=0.365, P=0.014) and average pupil (r=0.310, P=0.038). Disk halo size at postoperative 1 week was significantly correlated with age (r=0.324, P=0.030) and minimum pupil (r=0.297, P=0.047). Disk halo size at postoperative 3 months was significantly correlated with lenticule diameter (r=-0.362, P=0.015), initial diameter (r=0.311, P=0.037), maximum pupil (r=0.312, P=0.037), minimum pupil (r=0.440, P=0.002), and average pupil (r=0.373, P=0.012).


After SMILE, disk halo size showed a temporary increase and then returned to normal. Patients with larger lenticule diameter and smaller pupil size in pupillary response to light suffer less glare after SMILE.

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