Posters

Refractive and biometric changes after non-penetrating and aqueous-shunt glaucoma surgery

Poster Details

First Author: O.Giasin UK

Co Author(s):                        

Abstract Details

Purpose:

The aim of this study is to determine the changes in biometry and refraction after non-penetrating Deep sclerectomy (DS) and aqueous shunts (Ahmed valve and Beaveldt tubes) glacuoma surgery and literature review and comparison with the biometric changes after trabeculectomy surgery.

Setting:

Bristol eye hospital, Glaucoma department.

Methods:

This retrospective case control study reviewed electronic patient records of 50 eyes underwent deep sclerectomy surgery and 50 eyes underwent aqueous shunt surgery in our centre from June 2017 unitl February 2019. The biometric parameters after the performed glaucoma surgery ware compared to the post operative biometric parameters and compared to the changes in the non operated eye as a control. Our results were also compared to a literature review of existing similar studies which was found to have been conducted only for trabeculectomy surgery

Results:

An average decrease in AL of 0.12±0.07mm (p<0, 05) were observein the non penetrating surgery. An average of  0.78±1.2 diopters (D) with-the-rule (WTR) astigmatism changes were observed postoperatively after aqueous shunts. this found to be comparable to trabeculectomy affects on biometry on literature review

Conclusions:

It is known that trabeculectomy surgery would result in a reduction in AL, mainly correlated to the reduction in intraocular pressure. Our study found this to be across other types of glaucoma procedures. Penetrating surgery and aqueous shunts, however, caused a change in the keratometric readings and hence a more pronounced changes in biometry post operatively. Those changes are need to be taken in consideration when planning for cataract or refractive surgery following glaucoma procedure and to reduce refractive surprises.

Financial Disclosure:

None