Posters

Cataract surgery in myopic eyes: can the replacement lens be plano (0 diopter)?

Poster Details

First Author: I.Jeddou MOROCCO

Co Author(s):    Y. Mouzari   F. El Asri   K. Reda   A. Oubaaz           

Abstract Details

Purpose:

The purpose of our study is to show the difficulty and the precautions that must be considered during cataract surgery in eyes with an axial length greater than 30 mm. We also highlighted the interest of using lens calculator formula adaptated to high myopic eyes and the importance of setting up an implant zero diopter rather than keeping the eye aphakic.

Setting:

The ophtalmology department of the military hospital Mohamed V of Rabat. Morroco

Methods:

Ten highly myopic eyes with axial lengths greater than 32.58 mm on average were implanted with a monofocal zero diopter acrylic posterior chamber lenses at the time of cataract surgery. We used the SRK-T formula with an aim of a slightly myopic postoperative refraction. Two of the patients have had a plano lens in their two eyes. We noticed the age of the patients, their visual acuity before and after surgery, the presence of other ocular concomitant pathology as well as the intended postoperative, and achieved postoperative spherical equivalent.

Results:

The middle age of the patients was 57 years old. Corrected visual acuity improved from counting fingers to 20/40 on average as most of the eyes was having staphyloma or amblyopia and one patient had a history of retinal detachment. The preoperative refraction was -19 to -29 diopters, the intended postoperative spherical equivalent was -0.75 diopters on average and the achieved postoperative spherical equivalent was -0.12 to -4.12 diopters with an average of -2 diopters. All the patients experienced hyperopic refractive errors after surgery. No eye have experienced a peroperative capsular rupture neither a postoperative retinal detachment during the foolow-up.

Conclusions:

Cataract surgery in high myopic eyes requires a good knowledge of the anatomical and functional characteristcs of the latter. The decision to implant a zero diopter lens is a wise choice as this lens helps to separate the anterior and posterior segments of the eye, which could be beneficial if certain types of eye surgery are required in future and allows avoiding some frequent complications in the  myopic eyes (early posterior capsular opacification and acute detachment of the posterior vitreous), nevertheless it does not prevent  the hyperopic refractive errors often found in very myopic eyes.

Financial Disclosure:

None