Retinal and pre-retinal hemorrhages are seen in 25% of SAH patients. There are, classically, three types of hemorrhage that can occur alone or in combination. First, retinal hemorrhage which may surround the fovea; second, sub-hyaloid pre-retinal hemorrhage, seen fundo-scopically in 11-33% of cases as bright-red blood near the optic disc, which may be associated with a higher mortality rate and, finally, Terson's syndrome, consisting of hemorrhage within the vitreous humor in SAH patients occurring in approximately 4% of cases and usually bilaterally.
The prognosis for spontaneous visual recovery in 6-12 months is good, but patients should be monitored for complications such as elevated intra-ocular pressure, retinal membrane formation and even retinal detachment.
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