Walker RA, Rubab S, Voll ARL, Erraguntla V, Murphy PH. Macular and peripapillary retinal nerve fibre layer thickness in adults with amblyopia.
Can J Ophthalmol 2011;
46:425-7. [PMID:
21995986 DOI:
10.1016/j.jcjo.2011.07.013]
[Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 02/21/2011] [Accepted: 04/26/2011] [Indexed: 10/26/2022]
Abstract
OBJECTIVE
To evaluate macular and peripapillary retinal nerve fiber layer (RNFL) thickness in amblyopic eyes compared to the fellow eye.
DESIGN
Cross-sectional study.
PARTICIPANTS
30 patients (60 eyes) older than 18 years of age with amblyopia.
METHODS
Inclusion criteria included individuals older than 18 years, amblyopia, and best-corrected visual acuity (BCVA) ≤ 20/40. A complete medical history was taken and an eye examination carried out. Optical coherence tomography (OCT) was carried out on both eyes of all patients. Exclusion criteria included intraocular pressure (IOP) >23 mm Hg and eye pathology that may affect OCT measurements. The primary outcome measures were foveal thickness and average peripapillary RNFL thickness, which were compared using a paired t test. Quadrants in peripapillary scans and concentric rings in macular scans were analyzed.
RESULTS
The average age was 56 years (range = 33-82 years). Visual acuity ranged from 20/40 to 20/4000 (mean = 20/275). The average peripapillary RNFL thickness was 90.6 μm (SD = 9.6 μm) in the amblyopic eye and 90.1 μm (SD = 12.1 μm) in the fellow eye (p = 0.64). The average macular thickness in amblyopic eyes was 260.1 μm (SD = 32.0 μm), and 254.7 μm (SD = 32.5 μm) in fellow eyes (p = 0.10). No statistical difference existed between peripapillary quadrants or macular concentric rings. These differences were smaller when the strabismic amblyopes were isolated.
CONCLUSIONS
There does not seem to be a difference in peripapillary RNFL or macular thickness between the amblyopic eye and fellow eye.
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