I was freediving over the last few days in Kona and I got a terrible pain in my left eye. About my 7th or 8th dive at about 60ft I noticed a pain in my left eye that increased as I went deeper. At 70ft I had to stop and return to the surface. I adjusted my mask in case it was some sort of weird mask squeeze. I made two more dives with similar results and called it a day. The next day I went out and had no problem for at least 10 dives, then it started again, around the same depth. My eye looked normal, no blood vessels ruptured, and the pain stopped as soon as the pressure decreased. This is the first time I've ever had any problems like this. Anyone have any idea what it might be, or how to stop it? Thanks