I've had astigmatism all my life. I had to get glasses for my learners permit at 15 but passed the eye exam at 16 then failed every year since. No problem with red dots. But my eyesight has actually improved over the years. My last exam, I only had a .25 correction so I could probably pass my eye exam once again after the better part of 40 years. I shoot without glasses and my only real issue is trying to read tiny print.