I am partially sighted having beein born with very severe short sight so have spent my life with people peering into my eyes
I don't like the puffer but then again have had the other one as well and not happy having something touching my eyeball either ( can't win can they!).
The worst test I had was to make sure my retina was attached all the way round and the chair I was on was tipped back so my head was lower than my body and then he pushed under my eyeballs all the way round with a prodder. It wasn't painful as such but felt very very awful. He apologised at how weird a test it is.
I have cataracts in both eyes and the gel inside my eyes has collapsed and gone cloudy, they theoretically can operate on me but there is big risk they will blind me. The retinal surgeon I see said in a really upbeat voice that if I decide to risk the operation then the good news is he can do both a vitrectomy and cataratct surgery and lens implant under local anaethetic, he got a very horrified face in return with the comment " is it compulsory to be awake". When he had stopped laughing at my expression he said not if you don't want to be - thats me then out for the count one day.