I'm so sorry you've experienced this. It's so awful and scary to feel like you don't have any control over it. My wife who is 55 lost central vision in her left eye and was diagnosed with NAION last year. She has small disk to cup ratio but no other comorbidities. She did the sleep test and doesn't have sleep apnea etc., The neuro opthamalogist put her on steroids for a bit but didn't seem to make any noticeable difference which was sort of the expectation. The doctor did recommend that she fly with an oxygen concentrator to lower the risk of it happening in her right eye which she does now for all flights. She also tries to book on larger airplanes (when reasonably possible) because she read research that they maintain something better than smaller planes (must be pressure or something — I can't quite recall). At first she was skeptical of hauling the oxygenator around because it's a slight pain and even the neuro opthamologist didn't have solid research that proved it would prevent a NAION event but we all agree it's worth the hassle on the off-chance that it doesn't make a difference. It's a small effort to make. The oxygenator itself was expensive but gives her some peace of mind.