There are some very strong poppers on the market now using isopropyl nitrite. There is a definite link to eyesight problems. I have experienced this. I have been using poppers since I was 18. Now 60. No issues until I had a session with a strong isopropyl nitrite popper last week. Definite eye issues. Only solution is to stop using that popper and see if the eyes correct.
This article in the British Medical Journal should not be ignored ...