Abstract

MEASUREMENT OF PERIPAPILLARY RETINAL NERVE FIBER LAYER THICKNESS BY THREE DIMENSIONAL OPTICAL COHERENCE TOMOGRAPHY; A CROSS SECTION OF OUTPATIENT ATTENDEES IN OPHTHALMOLOGY CLINIC

Dr. Abathar Saudi Khudhair* M.B.Ch.B. H.D.Ophthalmology, Dr. Awrad Abdulameer Abdulzahra, M.B.Ch.B. H.D.Ophthalmology and Alya Abood Kreem, Consultant Ophthalmologist M.B.Ch.B, Ficms_ophth, Cabm_ophth

ABSTRACT

Background: Assessment of the peripapillary retinal nerve fiber layer (RNFL) thickness is an important approach for detecting structural damage in patients with glaucoma and many neurological diseases. Imaging techniques such as computed tomography are gaining popularity in the diagnosis of any early defects in retinal nerve fiber layer. Objective: To measure Peripapillary retinal nerve fiber layer thickness by using three Dimension Optical Coherence Tomography 2000 in subjects attending the ophthalmology clinic. Materials and Methods: A cross sectional study of 206 normal eyes from 150 subjects aged from (18-80 years) at Al Sadr medical city/ kufa / najaf was conducted to find the peripapillary RNFL thickness. Using 3D-OCT 2000(Topcon Inc.) and taking the peripheral circle of a 3mm scan. Data were collected and evaluated statistically using (T and ANOVA) tests and p value ≥ 0.05 was considered significant. Results: Mean retinal nerve fiber layer thickness for various quadrants was (111.213μm±14.97, 115.242μm±18.95, 75.121μm±14.66, 69.058μm±12.36) for the superior, inferior, nasal and temporal quadrants respectively. Older subjects have thinner layers and females have thicker layers but the difference was statistically insignificant .superior quadrant RNFLT was thicker in eyes with higher IOP to a significant level .Right eyes showed thicker layer than left eyes in all quadrants but only the superior quadrant difference was statistically significant. Conclusion: Values of RNFL thickness in our population are close to other studied populations with a mean thickness of (92.46 μm ±10.83). Higher IOP and right sidedness are associated with significant thickening in superior quadrant RNFL thickness.

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