This study was undertaken to investigate the retinal neurovasculature, choroidal thickness and choroidal vascular index (CVI) changes at the macula at one week, one- and three-month intervals post inferior oblique muscle myectomy. The hypothesis was that, given the close proximity of the inferior oblique muscle to the macular, inferior oblique surgery could potentially affect the macular neurovasculature. This was a prospective study of 18 patients (13 male) with mean age at surgery of 24.22 ±18.14 years. There was no difference in preoperative parameters for both eyes and no significant changes noted in macular retinal vascular profile. Significant changes were seen in the pattern of subfoveal CVI and subfoveal choroidal luminal area (CLA). The CLA increased in the first week but returned to baseline measures at last follow-up. Choroidal vascular index decreased. There was no significant change in macular thickness profile over time. The limitations of this study were small sample size, limited age range and no axial length measurements. Thus, further studies are advised. The authors conclude that some initial changes occur for choroid hemodynamics but these are temporary.
Macular choroidal changes after inferior oblique muscle surgery
Reviewed by Fiona Rowe
Evaluation of macular neurovasculature and choroidal blood flow following inferior oblique myectomy using OCT angiography.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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