Posters

Visual quality comparison of implantable collamer lenses at different decentering distances

Poster Details

First Author: X.Fang CHINA

Co Author(s):    X. Liu                    

Abstract Details

Purpose:

To investigate the effect of the central hole decentration of ICL V4c on the visual quality.

Setting:

Aier School of Ophthalmology, Central South University, Shenyang Aier Eye Hospital，China

Methods:

This study included 74 eyes of 37 patients after implantation of the Visian ICL（ICL/TICL sensitivity was assessed 1d, 1week, 1 and 3 months after surgery. The decentering distance (distance from the hole center to the vertical line passing through the corneal apex) was measured by Pentacam. We classified the eyes into three groups based on the decentering distance. Group A, within 180μm; Group B1, within 180μm to 360μm; Group B2, 360μm or more.  Postoperative contrast sensitivity of the 3 groups under the photopic and mesopic conditions with or without glare was tested and then compared

Results:

Under photopic conditions, photopic with glare conditions and mesopic with glare conditions, for 3cpd and 6cpd, there’s significant difference in the contrast sensitivity between the groups; for 12cpd and 18cpd, the difference was not significant. Under Mesopic conditions, the difference of the contrast sensitivity between the groups for 3cpd is significant; whereas not for 6cpd,12cpd and18cpd.

Conclusions:

1. For low spatial frequencies(3cpd,6cpd), the changes of positions of central hole affected the contrast sensitivity in different decentering groups while for the high spatial frequencies the effect was not significant (12cpd, 18cpd). 2. The decentering distance affected the visual quality within the range of 180~360um.

Financial Disclosure:

None