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Without even opening the article I can predict that it informs everyone of what a behemoth Luxoticca is.

As a person with a nearsightedness measurement greater than -5.5, it's something I had to educate myself on.

Costco optical is a decent option for retail sales.

Do you need a Costco membership to buy glasses from them?

Even buying a Costco membership for the sole purpose of buying glasses will likely save you money vs LensCrafters or independent eyewear stores.

My dad's last two pair of glasses (reading & normal) cost him $2100. That's criminal

Yes.

That said, you don't to see their optometrists, if you want a cheap prescription to go use online.