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The prognosis for central retinal visual acuity is poor with only about one-third of patients recovering useful vision. The longest delay in getting treatment that has been associated with significant visual recovery was approximately 72 hours.
Branch retinal artery occlusions (BRAO) have a recovery rate of 80% where vision is restored to 20/40 or better.
Source: The Gale Group. Gale Encyclopedia of Medicine, 3rd ed.";

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