| Buying glasses online is very popular, but there are a lot of misconceptions about the process. Some people think that glasses bought online are of lower quality than those found in the store. Some feel that getting a proper fit is impossible to do online, but these issues aren't true at all. Good eyeglass buying sites will show you how to measure your face so that your new glasses will fit- and the glasses they offer are every bit as good as those you would buy at the optometrist's office. Buying glasses online can be a tricky, but if you can do it well, you can save as much as 80%.
You'll need a prescription to buy glasses online- you can get a copy when you get an eye exam. Eyeglass prescriptions can be written in more than one way, and this makes it harder to order online. Good eyeglass retailers can walk you through the process.
All prescriptions have the same basic information: values for "dist" (the distance correction you require) and "add" (the reading correction you need). These are usually written per eye, with a + or a - and a number. You will also see the terms "axis" and "cyl"; if there are numbers there, it means you have an irregularly shaped eye (astigmatism). If you have "sph" on your prescription, no correction is required.
A good prescription also contains a "PD" number- PD stands for pupillary distance. This is used to position the lens and to center it in front of your pupil. It ensures your glasses' proper fit, and is essential in their proper positioning on your face. It's not always included on a prescription, but if you need it, ask your eye doctor.
Some prescriptions include a number for BCVA, which is a measure of how good your vision will be with the new glasses. This number isn't required, but it's interesting to see how well your new glasses will correct your vision.
Buying glasses online doesn't have to be hard. With the information above and a good prescription, you can get the glasses you want at a much cheaper price. |
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