What causes sudden loss of vision and dizziness?
Patient: I'm 20 yrs old and a few times now had episodes where suddenly my vision goes and I can't see anything I feel all sweaty and dizzy and sometimes collapse .  This has happened about 4/5 times now .  It can happen even if I'm just sat down . What can be causing this Doctor: Dear user, thank you for your query, please get your blood sugar level tested, if you are taking any medications refer to your doctor, plus once you feel that again go to nearest clinic get blood pressure heart rate and blood sample for basic hormonal check up. hope that helped. stay safe.Best regards