No problems, 30+ years of staring at monitors of various types in all kinds of light.
I do have bifocals now (the type that have a gradual transition so one doesn't look like an obvious grandpa :) ). These helped enormously in my mid 40s, took less than a day to get used to.
Other than that, my corrected vision is better than 20/20.
Any old glasses. How much your vision improves depends upon your prescription. For someone like me with astigmatism, getting better than perfect is difficult. If you're simply myopic, you could very well improve to 20/15 or 20/10.
20/20 is just an average, so it's far from "perfect vision". It's like having an IQ of 100.
I do have bifocals now (the type that have a gradual transition so one doesn't look like an obvious grandpa :) ). These helped enormously in my mid 40s, took less than a day to get used to.
Other than that, my corrected vision is better than 20/20.