It has been recently confirmed by a study conducted at the Pacific University College of Optometry that "Nearly half of prescription spectacles delivered directly by online vendors did not meet either the optical requirements of the patient's visual needs or the physical requirements for the patient's safety."
The study evaluated 308 lenses ordered online (154 pairs) and found a remarkable number failed tolerance standards for optical parameters or failed impact testing (suggesting low quality materials).
The full article published in the reputable Optometry magazine can be found here.
At Island Optical & Eyecare, you can be certain we only use the highest quality products, backed by 2 year warranty, and our opticians verify all parameters to ensure that every aspect of glasses is accurrate before being dispensed to our patients.