So, like... I'm pretty ignorant on biology, genetics, gene editing, and such. But... could one alter their genetics for, say, poor eyesight and eventually have

So, like... I'm pretty ignorant on biology, genetics, gene editing, and such. But... could one alter their genetics for, say, poor eyesight and eventually have better eyes? I mean, I imagine that there is a shelf life for cells already in the body and they don't just go away right away. But they are also constantly being replaced, right? So... can I just... rewrite my genome to replace my eye cells with "better" eye cells? And--hypothetically speaking, for sure, certainly, I assure you--who might be capable of such a thing, and what might they like as remuneration?