the clinical effect of pentoxifylline , given orally at doses of 300 mg to 600 mg for 3 months , was studied in 20 patients ( 23 eyes ) with retinal haemorrhage caused by disturbances of retinal circulation , i.e . branch and/or total obstruction of the central retinal vein , obstruction of the central retinal artery , diabetic retinopathy and polycytaemic retinopathy .
C0007688
obstruction
C0035309
retinopathy