Buying eye glasses is very common now. you can have lots of choices from online stores. And you can also save some money. But when buying eye glasses online, there are something you need to do.
If you already have a pair of glasses you like, carefully measure the size of the lens for reference. It may not seem like much difference, but if your current lenses are 65mm wide and you like the way they look, 55mm wide ones might feel awkward.
Ordering is even easier if you know your pupillary distance—the measurement between your two pupils. While the PD of most adults falls in a pretty close range and using an average will work in a pinch, knowing the exact distance for your face ensures the center of the lens is placed directly over your pupil. The more powerful your prescription, the more important the lens be properly centered. You can ask to be measured for your PD when you get your eyes examined, or have a friend photograph you with a ruler for scale and check the distance that way. Be prepared to get a lecture about the dangers of buying eye glasses online if you ask for your PD at the optometrist.
You need to know your prescription. It's a violation of federal law in the U.S. for your optometrist to withhold your prescription from you, so don't feel pressured to buy a pair of expensive retail price glasses after you go to get an eye exam. While most sites won't require you to scan or fax your prescription—Zenni Optical didn't—you still need to know the right numbers. Make sure to ask if you can't read the optometrist's handwriting.
Keep your eye out for deals on websites devoted to mail-order-glasses like the blog Glassy Eyes. Not only are the reviews informative, but there are entire forums devotes to discussing eyeglasses and related information. A stop there can easily score you a coupon for 15% off, with some great tips to boot.
In a word, there are two things you have to get beforing buying eye glasses online, they are pupillary distance and prescription. With these two you can set to your online eye glasses shopping.