 [ Symptoms ] i had sudden 15 min extreme blurred vision after being out in the cold for 40 min and fasting 36 h likely ive diabetes  28 y m 134 lb up 1 from last sun 2 3 from 2 wks before then 58 5 dad is type 2 diabetic [ Disease ] not likely cold can cause constriction of the eye capillaries fasting causes drop in blood pressure and detoxification symptoms