* 1. Circulatory disturbances when bending over or straining (postural hypotension)
2. Essential hypotension

 A. Arteriosclerosis
 B. Chronic hypotension
 *C. Fatigue
 D. Hormonal disorders
 E. Hunger
 F. Vitamin deficiency

3. Fainting with vasomotor collapse
4. Heart failure
5. Transurethral resection of the prostate

Creel DJ, et al. Transient blindness associated with transurethral resection of the prostate. Arch Ophthalmol 1987; 105:1537-1539.

Levin LA, Moohta V. Postprandial transient visual loss. Ophthalmology 1997; 104:397-401.

Pau H. Differential diagnosis of eye diseases, 2nd ed. New York: Thieme Medical, 1988.