The relationship between enclosed or partially-enclosed ora bays and retinal tears was studied in 1,000 consecutive autopsy eyes. Enclosed ora bay was present in 4.0% and partially-enclosed ora bay in 0.6% of eyes. Retinal tear was associated with 16.7% of either type of ora bay, and occurred posterior to and meridionally aligned with such bays. All such tears occurred at the posterior border of the vitreous base and were a consequence of posterior vitreous detachment. Retinal tears associated with enclosed or partially-enclosed ora bays were present in 0.5% of the 1,000 eyes examined.
Spencer LM, Foos RY, Straatsma BR. Enclosed Bays of the Ora Serrata: Relationship to Retina Tears. Arch Ophthalmol. 1970;83(4):421–425. doi:10.1001/archopht.1970.00990030421006
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