Assessment of retinal nerve fiber layer thickness in myopic patients using optical coherence tomography

Sharawy, Ashraf S.; Aldghaimy, Ahmed H.; El Soghair, Osama AbdElmoneam; Badry, Aya Mahmoud

doi:10.21608/svuijm.2019.120952

Assessment of retinal nerve fiber layer thickness in myopic patients using optical coherence tomography

Document Type : Original research articles

Authors

¹ Department of Ophthalmology, Faculty of medicine, Alexandria University, Alexandria,Egypt

² Department of Ophthalmology,Faculty of medicine, South Valley University,Qena,Egypt

³ Department of Ophthalmology, Qena general hospital , Qena,Egypt

10.21608/svuijm.2019.120952

Abstract

Background: Optical Coherence Tomography is the key tool for assessment of the retinal nerve fiber
layer (RNFL) thickness which is occasionally altered in myopic patients.
Aim of study: To assess the effect of different degrees of myopia on the thickness of retinal nerve
fiber layer by the use of spectral domain optical coherence tomography .
Patients and Method(s): Our study included examination of 40 myopic patients and 40 emmetropic
persons.Retinal nerve fiber layer thickness was measured by the use of Optical Coherence
Tomography.
Results: Evaluation of RNFL thickness at the different sectors revealed that the thickness at the
superior sector is of 102.13 ± 24.91μm for the myopics and of 124.5 ± 15.58 μm for the emmetropes.
At the inferior sector the thickness was of 114.08 ± 25.15μm for the myopesanf of 134.63 ± 19.08
μm for the emmetropes ,at the nasal sector the thickness was of 71.9 ± 20.62 μm for the myopes and
of 81.48 ± 9.45 μm for the emmetropes, at the temporal sector the thickness was of 75.25 ± 23.4 μm
for the myopes and of 74.78 ± 13.42 μm for the emmetropes .
Conclusion: Different grades of myopia affects the RNFL thickness by different degrees with the
thinnest one goes to the high myopia. So, High myopia should be considered in the interpretation of
OCT data because of thinning of RNFL thickness, and normative database corrected for refractive error
and axial length should be incorporated.

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