Posters

Quantitative UBM (Q-UBM) and anterior segment OCT (AS-OCT) of lens and IOL position and clinically-measured depth-of-focus of the eye

Poster Details

First Author: P.Fedor USA

Co Author(s):                        

Abstract Details

Purpose:

To evaluate the actual IOL position in comparison to effective lens position (ELP) by new quantitative ultrasound biomicroscopy (Q-UBM) and anterior segment OCT (AS-OCT) and compare it with clinically measured depth of focus of the eye.

Setting:

Anterior segment private practice with four locations.

Methods:

This is a retrospective non-randomized study comprising 30 eyes of 30 patients with Quantel Q-UBM imaging and Topcon Triton AS-UBM before and after cataract surgery. New system of quantitative AS analysis was developed defining 3 layers of AS: scleral spur, iris and ciliary apex layer. Scleral spur depth (RD), peripheral IPE depth (ID), ciliary apex depth (XD), and corresponding spur-to-spur (RTR), IPE-to-IPE (ITI), apex-to-apex (XTX) were defined. Ciliary angle (CA) and iris angle (IA) describe movement of ciliary-lens membrane (CLM) and iris membrane (IM) in a new biomechanical eye model.

Results:

Preoperative RD was 3.86 +/-0.27 mm, ID 4.18 +/-0.29 mm, XD 4.59 +/-0.4 mm, CA was -0.3 +/-12.2 mm, IA 9.7 +/-6.3 mm. Postoperative RD was 3.80 +/-0.27 mm, ID 4.22 +/-0.28 mm, XD 4.76 +/-0.32 mm, CA was -14.57 +/-12.86 mm, IA  -0.77 +/- 2.34 mm. Q-UBM measurements are compared with Topcon Triton AS-OCT and additional landmarks and distances are analyzed.

Conclusions:

Quantitative UBM and Anterior segment OCT are suitable for quantitative analysis of the entire anterior segment including ciliary body area and provide complementary data. Depth of focus of the eye is evaluated using a new clinical method.

Financial Disclosure:

None