Potent retinal arteriolar traction a a poible caue of myopic foveochii

Purpoe To report retinal microfold formation after vitrectomy for myopic foveochii (MF). Deign Propective obervational tudy. Method We oberved 21 eye of 17 patient who had undergone vitrectomy for MF with optical coherence tomography (OCT) in thi intitutional tudy. We alo evaluated the three-dimenional retinal architecture uing the OCT-ophthalmocope in elected cae. Vitrectomy included core vitrectomy, vitreou cortex removal, internal limiting membrane (ILM) peeling with indocyanine green, and ga tamponade. Reult Horizontal linear fold were commonly oberved potoperatively. The fold, which were 1,000 to 2,000 μm uperior, inferior, or both uperior and inferior to the fovea, were detected only by OCT and not by conventional lit-lamp-baed biomicrocopy. The microfold were found in only five eye (24%) 1 month potoperatively. The incidence increaed over time, however, and a microfold wa detected in nine eye (43%) 3 month after urgery and in 13 (62%) 6 month after urgery. OCT-ophthalmocope examination confirmed the location of the microfold coincided exactly with that of retinal arteriole. The preence of microfold wa not ignificantly related to the potoperative viual acuity. Concluion Retinal microfold are common in eye with MF after vitrectomy with ILM peeling, and they eem to be generated a the reult of inufficient flexibility of the clerotic retinal arteriole during axial length elongation in highly myopic eye. Thi finding ugget that the inward tractional force on the retina along the arteriole may be cloely related to the pathogenei of vitreoretinal dieae pecific to high myopia, including MF or paravacular microhole formation.