Assessment of Posterior Segment Using Spectral Domain OCT in Highly Myopic Eyes



Heba Radi AttaAllah*, Ismail Ahmed Nagib Omar, Ahmed Shawkat Abdelhalim
Ophthalmology Department, Lecturer of Ophthalmology, Minia University Hospital, Faculty of Medicine, Minia University, Al-Minya, Egypt


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© 2017 AttaAllah et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Ophthalmology Department, Lecturer of Ophthalmology, Minia University Hospital, Faculty of Medicine, Minia University, Al-Minia, Postal code: 61111, Egypt; Tel: +20862342505; E-mail: heba.ali@mu.edu.eg


Abstract

Purpose:

Spectral Domain Optical Coherence Tomography (SD-OCT) was used to evaluate retinal and vitreo-retinal changes that occur in highly myopic patients.

Methods:

This prospective study included 472 eyes of 472 patients suffering from high myopia (> -6.00 D), between May 2012 and December 2015. All patients were examined, using Cirrus HD OCT (Zeiss Cirrus TM HD-OCT model 4000), to detect any retinal or vitreo-retinal interface abnormalities.

All obtained data was analyzed using Statistical Package for the Social Sciences software version 17 (SPSS Inc, Chicago, IL, USA) and the paired two-sided t-test. Bivariate correlations were performed between different parameters using the Spearman correlation coefficient (r).

Results:

Mean spherical equivalent (MSE) was -13.11± 4.35D. Mean axial length (AL) was 28.5±1.62 mm. Posterior vitreous detachment (PVD) was the most frequent OCT finding; representing 33.4% of the cases, 13.7% of them were associated with macular traction. A statistically significant positive correlation was found between AL and MTM, full thickness macular hole, PVD with traction, and dome shaped macula (r = 0.49 and P = 0.001, r = 0.422 and P = 0.0001, r = 0.25 and P = 0.03, r=0.475, P=0.001 respectively)

Conclusion:

OCT is a valuable tool in detecting retinal and vitreo-retinal interface abnormalities in highly myopic eyes, and it can be used for follow up of those patients to avoid advanced retinal damage.

Keywords: Dome shaped macula, Foveoschisis, High myopia, Myopic traction maculopathy, Myopic macular hole, Myopic CNV.