Online shopping has already penetrated into every aspect of people's lives. If you still only know how best place to buy eyeglasses in physical stores and haven't tried online glasses, it's time to give it a try.

The eyeglass mart is no longer a taboo field, and now you can find cost-effective eyewear channels online to see how to find cost-effective glasses online.

Optometry data is the data that needs to be provided for optometry, whether it is online or offline optometry, which is a prerequisite. If you have been to a professional optometry institution or ophthalmic hospital for optometry before and have optometry data at hand, then it is as simple as ever. Simply note the data in the order when eyeglasses online cheap the glasses.

If there is no optometry data, then I still need to go for an optometry first. I went directly to an ophthalmic hospital for optometry a few years ago because there has been no change in myopia over the years. With this set of data, I have already equipped 7 or 8 pairs of glasses online.

Some people know their degree of myopia and do not have astigmatism, so they only need to measure one more pupil distance to get online glasses.

Pupil distance refers to the distance between the centers of the pupils in our eyes, represented by PD on the optometry sheet. This data is important to ensure that the optical center point of the lens matches the center point of the pupils so that the glasses will be clearer and more comfortable to wear.