The relation between implantable collamer lens (ICL), postoperative pupil size and lens vault

Session Details

Session Title: Refractive
Session Date/Time: Friday 15/02/2019 | 08:30-10:00
Paper Time: 09:44
Venue: Room MC3

First Author: H.Huang CHINA
Co Author(s): E. Pazo  Z. Liu  C. Zheng  L. Xu  W. He     

Abstract Details

Purpose:

To assess the changes in postoperative pupil size due ICL implantation and its impact on lens vault in eyes with high myopia.

Setting:

Shenyang He Eye Hospital, Shenyang, Liaoning, China.

Methods:

A total of 60 eyes of 30 consecutive patients with high myopia undergoing implantation of V4c (Star, Switzerland) ICL were retrospectively assessed. Visual acuity (VA), pupil diameter (PD) (Pentacam), anterior chamber depths (ACD) (Pentacam), intraocular pressure (IOP) and ICL vault were examined at the preoperative, postoperative at 1-month, and 3-month stages. The preoperative and postoperative pupil diameter were also compared with each other to note the differences between them. The correlations between the change in postoperative pupil diameter and ICL vault were analysed.

Results:

Preoperative mean PD was 3.10±0.57mm and postoperatively at 1-month and 3-month it decreased to 2.83±0.44mm (p<0.001) and 2.62±0.42mm (p<0.001) respectively. The coloration between change in postoperative PD and ICL vault was at 1-month (R=53.01; p<0.001) and 3-months (R=45.05; p<0.001) respectively; Correlation between preoperative ACD and ICL vault at 1-month and 3-month postop was: R=38.06; p<0.001 and R=45.29; p<0.001 respectively. Correlation between postoperative IOP and PD change at 1-month (R=44.07) and 3-month (R=46.10) were significant.

Conclusions:

PD tends to decrease at the 1-month and 3-month stages after ICL implantation and the significant coloration between increase in IOP and PD change suggests that reduction of PD may be caused by possible contact between the ICL and the posterior iris surface affecting the flow of aqueous humor in such a small space leading an increased pressure to the posterior surface of the iris and thereby affecting the pupil. Biometric parameter such as the ACD can possibly be used to predict the vault after ICL implantation using a new regression equation and machine learning.

Financial Disclosure:

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