Quote:
Originally Posted by anyonebutedmonton
Totally agree with you that it is a dumb idea to skip over the yearly eye exam simply because you can get glasses and contacts online.
Do you have any evidence that the lenses used in these glasses are of inferior quality?
|
Polycarbonate lenses are used often with online lenses. These are saftety strength lenses that are less dense (better absorption of impact) and thus have poorer optics. Even the best measured lenses will have worse optics than plastic, or glass.
In places that use regular plastic lenses the problem is quality control. Below is a study that gives some information on the quality issues of online lenses/frames
http://www.visionmonday.com/CMSDocum...e%209-2011.pdf