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Vienna 2018 Delegate Registration Programme Exhibition Virtual Exhibition Satellites 2018 Survey


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Crystalline lens analysis with anterior segment swept-source OCT Casia2 (Tomey)

Poster Details

First Author: K.Hawa FRANCE

Co Author(s):    N. Abraham   M. Puech                 

Abstract Details


To analyse crystallyne lens anatomy and lens positioning compared to anterior chamber depth for patients refered for narrow angle imaging.


XV-XX, Explore Vision Paris


Cristallyne lens factor analysis is based on anterior chamber depth (ACD), lens thickness (LT), lens vault (LV) and lens equator positioning. Casia2 OCT (Tomey) provides a large anterior chamber scan. Based on lens radius of curvature, lens equator diameter is defined. Corneal Endothelium to Equator Diameter distance (CEED) can caracterize lens positionning. 134 eyes (76 patients, 58 year+/-12) have been divided in 9 groups, based on EED and lenght thickness. Left column : lens>2,35mm, central column : 4,35>LT(mm)>4,97, rigth column : lens > 4,97mm. Each column is divided in 3 lines : CEED <3,55mm, CEED 3,55 to 4,10mm, CEED >4,10mm


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. In each column the higher the CEED the higher the ACD and the higher the CEED, the lower the LV.


Casia2 SS OCT gives new apporach on anterior segment analysis with lens equator location. CEED is a new mesurement correlated to lens positionning, to ACD and to lens vault. This CEED can quantify lens factor in case of narrow angle.

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