Posters

Vitreous volume enlargement syndrome (VE) and IOL position: new biomechanical model of the eye

Poster Details

First Author: P.Fedor USA

Co Author(s):                        

Abstract Details

Purpose:

To describe VE and Posterior Volume Enlargement syndrome (PE) based on Quantitative Ultrasound biomicroscopy (Q-UBM) and its effect on IOL position.

Setting:

Anterior segment private practice with four locations.

Methods:

VE and PE is described in 15 eyes of 15 patients before and after cataract surgery. Quantitative UBM (Q-UBM) images are analyzed and interpreted based on new biomechanical model of the eye. Two biomechanical barriers, the Lens-Ciliary membrane (LCM) and Iris membrane (IM) divide the eye in four basic compartments (K) – the anterior compartment (AK), intermediate compartment (IK), vitreous compartment (VK) and lens compartment (LK). The intraocular pressure can be different in each compartment: anterior intraocular pressure (AIP), intermediate intraocular pressure (IIP), vitreous intraocular pressure (VIP) and intralenticular pressure (ILP).

Results:

The intraocular lens is displaced in average 0.2 – 0.4 mm anteriorly in patients with vitreous volume enlargement syndrome (VE) that corresponds to 0.5 D to 1.0 D refractive shift and modification of IOL power calculation formulas.

Conclusions:

Q-UBM is suitable method to quantitatively analyze IOL position and anterior segment anatomy, diagnose PE and improve prediction of IOL position in small hyperopic eyes and biometric outliers.

Financial Disclosure:

None