Comment on These glasses solve many central-vision problems. For $5000.
ExcessShiv@lemmy.dbzer0.com 6 days agoHos are you able to obtain certification with aliexpress suppliers? They generally can’t provide proper (trustworthy) documentation that they comply with standards, so your certification chain is broken.
squaresinger@lemmy.world 6 days ago
Not, that’s part of the issue. And also a big reason why someone would pay for much more expensive industrial sources.