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.
If I could improve to better than 20/20, I might have to start wearing glasses. What are the best glasses to give super vision?