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Disk halo size after ICL V4c implantation

Poster Details

First Author: T.Han CHINA

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

Abstract Details


To investigate objective disk halo size produced by a glare source changes after ICL V4c implantation for myopia correction.


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


Prospective clinical study included 42 right eyes of 42 patients with a mean age of 24.76 ± 5.16 years and mean spherical equivalent (SE) of -9.64 ± 2.57 diopters. Disk halo size and pupillary response to light parameters was measured with a vision monitor before surgery, at postoperative 1 week, 1 and 3 months. Pupillary response to light parameters included 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 value, disk halo size decreased at postoperative 1 and 3 months. (both P<0.001) Amplitude of contraction, velocity of contraction and velocity of dilation decreased significantly at postoperative 1 week, 1 and 3 months (all P<0.001).Compared to preoperative value, minimum pupil increased significantly at postoperative 1 week, 1 month (both P<0.01), and returned at postoperative 3 months (P=0.043). Disk halo size at postoperative 3 months was significantly correlated with initial diameter (r=0.446, P=0.003), maximum pupil (r=0.483, P=0.001), minimum pupil (r=0.425, P=0.005), and average pupil (r=0.474, P=0.002).


After ICL V4c implantation, disk halo size decreased in a short term and pupillary response to light was influenced. Patients with smaller pupil sizes in pupillary response to light suffer less glare after ICL V4c implantation.

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