Welcome back, first step is go to a club first and try it.
Eyesight, yes you can use optical correction but only in glasses not in the rearsight, no optical aids are permitted on the rifle. I've just come back after 20 years and have had to invest in shooting glasses, its quite important to get the lens in the right place and the correct prescription, I'm on my second prescription and 3rd frames in the battle to get it right! Now using 30 year old Junkers frames and they are great!
Yes you can come back, my wife was GB team 30 years ago always with glasses, now at bus pass age and double cataract ops has returned now able to see well for the first time in her life and is near enough shooting at her old standard.
Good shooting
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?