Posters

Crystalline lens radius of curvature analysis with swept-source OCT (CASIA 2)

Poster Details

First Author: N.Abraham FRANCE

Co Author(s):    K. Hawa   M. Puech                 

Abstract Details

Purpose:

To analyse crystalline lens anterior (RFront) and posterior radius of curvature (RBack) compared to lens positioning. Crystalline lens radius of curvature (Front and Back) can be compared to lens positioning based on anterior chamber depth (ACD), lens thickness (LT), lens vault (LV) and lens equator positioning (Corneal Endothelial to Equator diameter distance CEED).

Setting:

Explore Vision Paris

Methods:

134 eyes (76 patients, mean age 58 year+/-12) have been divided in 9 groups, based on EED and lenght thickness. Left column : thin lens (<2,35mm), central column : 4,35>LT(mm)>4,97, rigth column : thick lens (> 4,97mm). Each column is divided in 3 lines based on CEED : CEED <3,55mm, CEED 3,55 to 4,10mm, CEED >4,10mm -Analysis of Mean radius of curvature in each group is compared to lens positioning.

Results:

134 eyes (76 patients, mean age 58 year+/-12) have been divided in 9 groups, based on EED and lenght thickness. -Analysis of Mean radius of curvature in each group is compared to lens positioning. Mean parameters : ACD : 2,34 +/- 0,27 mm,  LV : 0,720 +/- 0,218 mm, CEED : 3,82 +/- 0,28 mm, LT : 4,66 +/- 0,31 mm, Mean radius of curvature anterior (R Front) : 9,29 +/- 1,21 mm and posterior (R Back) : 5,59 +/- 0,45 mm In each column R-front increases with Lens anterior positioning  and R-back decreases with Lens anterior positioning.

Conclusions:

Casia2 SS OCT (Tomey) can give mesurements of anterior and posterior lens radius of curvature. Comparison of R-Front and R-Back with lens positioning (LV, CEED) shows that R-front increases with Lens anterior positioning  and R-back decreases with Lens anterior positioning.

Financial Disclosure:

None