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 ( > 0.05) and then decreased significantly at 1 and 3 months postoperatively (both < 0.001). Contraction amplitude and velocity, as well as dilation velocity, decreased significantly at all postoperative time points (all < 0.001). Disk halo size at 3 months postoperatively was significantly correlated with initial ( = 0.446, =0.003), maximum ( = 0.483, =0.001), minimum ( = 0.425, =0.005), and average pupil diameters ( = 0.474, =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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6710753 | PMC |
| http://dx.doi.org/10.1155/2019/7174913 | DOI Listing |
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