I found an Optometrist within walking distance and the customer service is amazing.The only reason I renewed my membership recently after a 10-15 year hiatus was to use their optometrist and get multiple pairs of glasses and a year's worth of contacts for the first time in my life.. since I had heard good things.
I'm happy I did as the final tally, all told, was/is comparable (to include membership cost) to the cheapest and not nearly as highly ranked other eyeball outfit and then internet sourcing for hardware dance out there.
I too could go on and on about costco, it's an unbelievably good store but I haven't gone back for any sort of shopping since I don't really need or want anything.
I remember a ways back they had chilled whole hanging lamb carcasses there for like $100/ea.. I still regret not getting one.
I filled up at Costco once... Once.