A number of conditions may be associated with a bilateral transient loss or darkening of vision.


Related to decreased perfusion:

(1) systemic hypotension

(2) postural hypotension

(3) heart failure

(4) vasomotor collapse with fainting

(5) severe carotid stenosis (associated with postprandial transient visual loss)


Other conditions:

(1) fatigue

(2) severe hunger

(3) vitamin deficiency

(4) transurethral resection of prostate (TURP) if glycine is used as the irrigating fluid (resulting in elevated serum glycine concentration)


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