Assessment of posterior segment in highly myopic eyes using spectral domain OCT

Session Details

Session Title: Special Cases

Session Date/Time: Sunday 14/09/2014 | 14:30-16:00

Paper Time: 15:36

Venue: Boulevard B

First Author: : H.AttaAllah EGYPT

Co Author(s): :    I. Moftah              

Abstract Details

Purpose:

we used spectral domain optical coherence tomography to detect retinal changes in highly myopic eyes and their correlation to each other and to age and axial length

Setting:

The study was prospective, it was done in El Minia investigation eye centre, between May 2012 and December 2013, and included 336 eyes of 236 patients suffering from high myopia

Methods:

This study included 336 eyes of 236 patients suffering from high myopia. All patients were examined with spectral domain OCT (ZEISS CirrusTM HD-OCT model 4000) to detect any retinal or vitreoretinal interface abnormalities, using multiple HD scans all over the macular area, and in the nasal retina. Axial length was measured using contact ultrasonic biometry (Sonomed)

Results:

This study included 336 eyes of 236 patients aged between 16 and 83 years old with mean ±SD of 51.53±13.72 years old, male patients were 40.5%, the spaerical equivalent ranged between -6.5 to -23 D, the mean spherical equivalent (MSE) was -13.11± 4.35D. The mean axial length (AL) measurement was 28.5±1.62 (26 - 33.85) mm. The posterior vitreous detachment (PVD) representing 34.1 % of the cases was the most frequent OCT finding detected, 14.1% of them associated with macular traction. Foveoschesis was the second frequent abnormality detected representing 27.4% followed by myopic choroidal neovascular membrane (CNV) representing 25%, of which 17.9% was active CNV. We found highly statistically significant negative correlation between age and active CNV (r= -0.28, p= 0.009). Axial length is negatively correlated with refraction, foveoschesis, and vascular microfolds (r=-0.778 and p= 0.001, r=-0.22 and p=0.48, r=-0.302 and p= 0.005 ) respectively. Statistically significant positive correlation was found between retinal detachment and full thickness macular hole, epiretinal membrane, and PVD with traction (r=0.49 and p= 0.001, r=0.422 and p= 0.0001, r=0.235 and p= 0.03 respectively)

Conclusions:

High myopia causes significant changes in the retina and the vitreoretinal interface, some of which lead to retinal damage. OCT is a valuable tool to detect these changes and can be used for follow up of those patients to avoid advanced retinal damage

Financial Interest:

NONE