Often the unaffected eye will compensate for the loss of vision in the other eye; however, this results in some loss of depth perception and parallax. Deterioration of sight may begin in either the central or peripheral vision. Deterioration is likely to begin in the upper part of the vision field as this corresponds with the bottom of the eye where blood usually pools.
The unaffected eye often compensates for the loss of vision in the other, leading to a reduction in depth perception and parallax. Vision decline can start either in the central or peripheral areas, with deterioration more likely at the upper part of the visual field due to its location near the bottom of the eye where blood tends to accumulate.