I have been buying glasses from my optometrist for decades. A pair runs about $500, after insurance. Dropped by Warby Parker on a lark (they have a store a few miles away). The glass tech looked over my glasses and told me the optical center was wrong by a bit; OK for 99% of prescriptions but that error was significant due to my prescription. (my corrected vision is 20/50 in both eyes) Ordered 1 pair. Noticeably better eyesight. For about $200.