Do not pursue a high refractive index lenses, for 500 degrees or higher, buy 1.6 index or more; below 500 degrees, buy 1.6 index lenses, if more than 1000 degree, then buy 1.7 index lenses or above.
You have to take to steps to buy your prescription glasses: getting your glasses prescription and then buy your prescription glasses. » Read more: Basic skills on prescription glasses.
Buying prescription glasses for kids is not a simply things, The kids glasses prescription must be accurate, including astigmatism axis, the horizontal axis, pupillary distance, all should be accurate and adjust well, then let your child to wear glasses for 15 minutes to see if there are headaches, dizziness or other abnormal sensory and visual material being seen tilted, if your child feel uncomfortable while wearing eyeglasses, the glasses should be adjusted again. » Read more: What you should know on kids prescription glasses!
