Foveal morphology of normal fellow eyes of patients with unilateral macular hole.
Ophthalmol Retina 2022;
6:361-368. [PMID:
34999016 DOI:
10.1016/j.oret.2021.12.022]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/22/2021] [Accepted: 12/29/2021] [Indexed: 11/21/2022]
Abstract
PURPOSE
To determine the morphology of the fovea in the ophthalmoscopically and tomographically normal fellow eyes of patients with unilateral idiopathic macular hole (MH) and to determine the association between the foveal morphological parameters and the foveal outer nuclear layer (ONL) thickness.
DESIGN
Retrospective observational study.
PARTICIPANTS
Two hundred three normal fellow eyes of patients with unilateral MH and 216 normal eyes of 216 healthy subjects.
METHODS
All eyes were examined by swept source optical coherence tomography (OCT). The built-in software measured the average retinal and choroidal thickness in the center and in the inner four subfields defined in the Early Treatment Diabetic Retinopathy Study. The total retinal thickness and the three retinal layers at the fovea and parafovea (0.25- and 0.5-mm nasal and temporal from fovea) and foveal floor width (FFW) were measured in the image of a horizontal scan passing through the center of the fovea. We defined the thickness between the internal limiting membrane and outer plexiform layer as the inner retinal thickness, and the thickness between the external limiting membrane and retinal pigment epithelium as the outer retinal thickness. Multiple regression analyses were performed with the age, sex, axial length, and the presence of a posterior vitreous detachment as the dependent variables.
MAIN OUTCOME MEASURES
OCT measurements and correlations between the foveal parameters and foveal ONL thickness.
RESULTS
The fellow eyes had a thinner central retinal subfield, thinner fovea, thinner ONL at all points except 0.5 mm nasal, significantly thicker outer retina at all points, and a wider FFW (P=.040 to P<.0001). The foveal ONL thickness was significantly and positively correlated with the central subfield retinal thickness and foveal thickness and negatively with the FFW (all P< .0001).
CONCLUSIONS
The thinner and deeper fovea and the thinner ONL of the fellow eyes of patients with a unilateral MH makes these eyes more susceptible to forming MH.
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