hi, thank you for providing a brief history of your sister. it is sad to hear all this symptoms arised all of a sudden. Since she was under a medical special and taking medication the physician must have taken proper assessment. Getting menus in between must have disrupted things as per me. Kindly meet an internal medicine specialist and get self assessed . He might prescribe some diagnostic blood sample to under go. kindly go through all. Get checked with the opthalmologist as well once on a safer note if anything is wrong with the pupil anatomy & physiological. Once the clearance comes from an opthalmologist you should meet up a neurologist and you may advised to an MRI of the brain. which will give the clear picture of the vision problem. since you started the history with the swelling and vision problem. I am here more concerned about the vision that it is more important as per me. meeting up a physician will even guide you to under go Doppler scan to check if any issue with the veins and arteries. as the diagnostic reports will one by one done will be helpful to rule out certain doubts of the physician and coming close to the problem will be possible your sister shouldn t have taken a pill to stop the menus . as menstrual cycle is a normal physiological process and stopping it with the chemicals if not advised as it will lead to a terror in the body. I am still unsure if the pill what she consumed to stop the mensus has lead to this. but please go to physician and get self checked. it s not harmful to take experts advise. as without doing a proper examination and observation it will be difficult to just give some statement. I hope you will understand. with the grace of God I wish your sister a good health.