The truth is, if you understand your prescription and have your existing rx glasses very useful, it is really quite simple to buy glasses online.
your present prescription. I keep mine in medical file in my filing cabinet. If you cannot find your prescription, visit wherever you last longer had your eye examined and ask a copy. Your optician, optometrist, or ophthalmologist is necessary by law release a your eyewear prescription to you. You now need to make note of a few critical bits of information from your prescription (see example above–click to enlarge). Among other information, you should see three columns on your prescription–sphere, cylinder, and axis.
Within the example prescription above, you will see the Pupillary Distance of the patient is 62. Write down this quantity also, it is the seventh of your seven critical amounts.
A slightly less critical number is your temple size. If you’re lucky, you’ll also see a temple duration and bridge size in your prescription. If not, don’t sweating it, you can number it out yourself. The temple span describes the distance of the two bars that hook up the eyeglasses to your ears. It is measured from where in fact the 90-level curve from your zoom lens structure to the side bars (temples) begins to the very end of the temple, including the curve. It isn’t measured from the flex point of the temples, because the “stub” between your flex point and lens structure is not really a standard size.
Now, remove some measuring tape (ideally the type of tape used for fitted clothes and sewing, as it is very flexible) and measure an existing couple of spectacles that fit comfortably. The average temple length for men is 135mm or 145mm. For females, 130mm to 140mm is standard. If your tape only has inches wide, measure to the nearest eighth or sixteenth and multiply that number by 25.4 to have the dimension in millimeters. Temple lengths are generally available in 5mm increments, such as 130, 135, 140, 145, etc. For the most part online glasses stores, temple size is shown within the frame description and is also not customizable. Therefore, you will need to discover a frame with an appropriate temple size. This occasionally varies if you are in a site specializing in designer eyeglasses, where you have the option to type your own temple size.
Actually, temple size is not a huge deal. I’ve one couple of eyeglasses with 135mm temples and another with 140mm temples. Both pairs fit comfortably. If for reasons uknown you can’t think of a temple measurement, don’t let that stop you from making an eyewear purchase online. Instead, simply choose 140mm temples if you are a guy and 135mm temples if you are a woman. It’s likely that, this length will fit easily.