subject: How To Buy Online Glasses [print this page] Due to their unparalleled advantages such as cheap and convenient, online glasses are favored by an increasing group of people. In fact, online eyewear has also aroused certain concerns. People worry about the fitness of online glasses since the glasses can not be tried until it is shipped to them. However, the accuracy of lens of online wear bothers more people. You can just use Google to search for references of your favorite online glasses or through the introduction of your friends about some well-known website. You will usually find any glasses you want. But customers should make enough preparations before surfing the internet for online eyewear.
It is recommended that eye wearers take comprehensive eye exam every 1-2 years. By doing this, you can get your up-to-date prescription from your doctor. This is the most important preparation before online glasses purchase. Feel free to ask for your prescription from the doctor after you pay for the exam. According to US federal law, its a violation for your optometrists to withhold your prescription from you. With the prescription, you can order the right online glasses with the right accuracy of lens.
Another useful preparation of online glasses purchase is the measurement of the distance of your two pupils. You may ask your doctor to record your pupillary distance (PD) on your prescription. The PD can be automatically acquired through a machine. The average PD of an adult is about 63mm and that of a child is around 54mm. But the exact number is critical to decide the size of the frame while ordering a pair of online glasses. You even can simply measure your PD using a ruler by yourself.
If you have a particular frame, some measurements of it are also important. The more detailed your prescription is, the more satisfying online glasses you will get.
by: MarkBurnsy
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