My wife, who is aged 42, recently suffered from bilateral colossal aneurysms behind her left eye, one of which had ruptured. A procedure called coil embolisation was used to treat her condition. Is she likely to be at any risk on long-distance flights (nine hours and over).

Dr Jules Eden replies: This surgery is performed to prevent any further bleeding from the vessels behind the eye. A coil is inserted and the artery is blocked up. It is then removed afterwards. Hopefully, the aneurysms or swellings in the vessel will never cause a problem again, and whatever sight is remaining is maintained. The risks of a long-haul flight are mainly venous thrombosis, and slightly lower oxygen levels compared to sea level. None of these will affect the arterial supply to the eye, and so there is nothing to worry about.

· I am currently recovering from varicose vein surgery on my left leg (I am 29) which was carried out last month. I plan to fly to Paris at the beginning of April and would like to know if it will be safe to fly by then; and if I should take any precautions such as wearing a compression stocking during the flight.

Dr Jules Eden replies: No need to worry. Varicose veins are part of the superficial venous system and as such have no real role to play in the formation of the dreaded DVTs. Furthermore, things should be back to normal with no residual inflammation or soreness in your lower legs six weeks after the operation. So it's fine to take that flight to Paris, and there's no need to wear a stocking.

· If you have any questions you want to ask Dr Jules Eden, email travel.doctor@theguardian.com, or write to The Flying Doctor, The Guardian, 119 Farringdon Road, London EC1R 3ER.