If you're total price shopping, yes.

If you want a specific frame for some reason, it's a good value. I bought a pair of Oakleys from glasses.com ( a luxottica online outlet) for a savings of about $50 from retail. I think the high index lenses were cheaper too. But if you buy $8 glasses, they are going to be junk.

AFAIK almost all the glasses frames are worth few dollars. What you pay for branded ones is marketing and bit of design, not generally the material quality.

I

I've been wearing the same $6 frames from Zenni for the last five years.

i can't say that they are all categorically low quality, but you're obviously not getting premium frames for very low prices. imo it's worth dishing for a pair of spares at the least, though -- but probably not at warby parker prices