Can I be disqualified of the process of enlisting of the army for astigmatism?

I joined with an astigmatism, didn't require a waiver.

Good advice from the anonymous Major. You can work around your astigmatism if it’s not too severe. I used an estimated offset when engaging a target with my M-16A1. I found that my rounds consistently impacted high and to the right of my aim point, so I shifted my fire lower and to the left of my aim point. That usually improved accuracy enough to hit my target. Of course, when you’re being shot at yourself, it requires discipline to remember to do that. I rarely wore my eyeglasses in combat. They weren’t compatible with the helmets we wore in 1968. The glasses didn’t fit under the helmet and bounced off my head when running, so I left them in the pocket of my flak vest until I got shot at., then I mentally hollered “Kings Ex”, yanked the glasses out of the pocket, jammed them into place and returned fire. Teddy Roosevelt is reported to have carried eleven pairs of glasses in the Spanish-American War. I didn’t have the luxury of multiple pairs, I only had one but they survived combat.