Dear Sir/Madam I was returning to Adelaide from Denpasar on flight JQ128 on 22/10/19 I had spent two nights in a hospital in Bali. For some reason one of the muscles behind one of my eyes had become slightly paralysed and therefore suffered double vision. I consulted an ophthalmologist and was advised to seek specialist treatment back in Australia. I questioned the doctor as to whether it was perfectly safe to fly and he assured me it was. While boarding with my travelling companion, a nurse of 30 years experience, I was slightly unsteady climbing the stairs to the plane as my balance had been affected by having the use of only one eye. I was pulled aside by the cabin supervisor called Celeste and questioned. I think she thought I was intoxicated. I had not drank any alcohol in 5 days. I provided documentation from the hospital stating that I was cleared to travel in economy. I explained this to her, explained my medical condition but was given a smart alec comment to the fact that travelling could mean just walking around in Bali. I asked her to speak to my travelling companion who was already seated but she refused. She then went and spoke to the pilot with my documentation and spoke for quite some time. I was becoming distressed as I might have been refused the right to fly and I was would of been left in a foreign country with nowhere to stay and no proper treatment. After some time the pilot had decided I was able to travel. She then babbled on about safety, which was a cop out and just jargon. The other flight attendant asked me if it was a contagious condition. ??????? Totally unhelpful and no apology. Is this the way Jetstar treat passengers? There was little/no care for my well being. It was almost as if they were deliberately looking for a way to stop me from travelling. I am a nervous flyer at the best of times and the only budget airline company I will fly with is Jetstar because of your excellent safety record. regards TERRY ALLAN.