Abstract
Purpose To investigate disk halo size changes produced by a glare source after surgical insertion of an implantable collamer lens with a central hole (ICL V4c) for myopia correction. Methods In this prospective study, disk halo size and pupillary light response with a vision monitor were measured preoperatively and at 1 week, 1 month, and 3 months postoperatively. Pupillary light response parameters included contraction amplitude, latency, duration, and velocity; dilation latency, duration, and velocity; and initial, maximum, minimum, and average pupil diameters. Results Forty-two right eyes of 42 patients were enrolled. Postoperative uncorrected distance visual acuity was better than or equal to 20/20 in all eyes. Compared to preoperative values, disk halo size showed no significant difference at 1 week postoperatively (P > 0.05) and then decreased significantly at 1 and 3 months postoperatively (both P < 0.001). Contraction amplitude and velocity, as well as dilation velocity, decreased significantly at all postoperative time points (all P < 0.001). Disk halo size at 3 months postoperatively was significantly correlated with initial (r = 0.446, P=0.003), maximum (r = 0.483, P=0.001), minimum (r = 0.425, P=0.005), and average pupil diameters (r = 0.474, P=0.002). Conclusions After ICL V4c implantation, disk halo size was reduced in the short term. Patients with smaller pupil sizes during pupillary response to light experienced smaller halos after ICL V4c implantation.
Highlights
E present study was performed to investigate disk halo size changes using a visual monitor with good repeatability [10], as well as their relationships with dynamic pupillary light response after ICL V4c implantation
As described in a previous study [12], the viscoelastic surgical agent was injected into the anterior chamber via a puncture site at the 6 o’clock position of the cornea; subsequently, an ICL V4c was implanted through a 3.0 mm temporal corneal incision using an injector cartridge and placed in the posterior chamber
Forty-two consecutive patients were enrolled; these patients had a mean age of 24.76 ± 5.16 years and mean spherical equivalent (SE) of − 10.42 ± 2.54 diopters
Summary
Disk halo size and pupillary light response with a vision monitor were measured preoperatively and at 1 week, 1 month, and 3 months postoperatively. Disk halo size showed no significant difference at 1 week postoperatively (P > 0.05) and decreased significantly at 1 and 3 months postoperatively (both P < 0.001). Disk halo size at 3 months postoperatively was significantly correlated with initial (r 0.446, P 0.003), maximum (r 0.483, P 0.001), minimum (r 0.425, P 0.005), and average pupil diameters (r 0.474, P 0.002).
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