your present prescription. I keep mine in the health file in my filing cabinet. If you can’t find your prescription, visit wherever you last longer had your sight examined and request a backup. Your optician, optometrist, or ophthalmologist is required by law to release your eyewear prescription for you. You now need to make note of a few critical pieces 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.
A slightly less critical number is your temple span. If you’re blessed, you’ll also see a temple duration and bridge size in your prescription. If not, don’t perspire it, you can body it out yourself. The temple duration describes the length of the two bars that connect the spectacles 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, like the curve. It isn’t assessed from the flex point of the temples, because the “stub” between your flex point and zoom lens structure is not really a standard size.
Now, take out some measuring tape (preferably the type of tape used for appropriate clothes and sewing, as it is very flexible) and evaluate an existing pair of eyeglasses that fit perfectly. The average temple span for men is 135mm or 145mm. For women, 130mm to 140mm is standard. If your tape only has ins, measure to the nearest eighth or sixteenth and multiply that number by 25.4 to obtain the way of measuring in millimeters. Temple lengths are generally available in 5mm increments, such as 130, 135, 140, 145, etc. For the most part online eye glasses stores, temple period is shown in a frame description and it is not customizable. Therefore, you need to find a frame with an appropriate temple size. This sometimes varies if you are in a site specializing in designer spectacles, where you have the choice to input your own temple size.
Frankly, temple size is not a huge deal. I’ve one pair of glasses with 135mm temples and another with 140mm temples. Both pairs fit perfectly. If for some reason you can’t come up with a temple measurement, don’t let that stop you from making an eyewear purchase online. Instead, simply choose 140mm temples if you are a man and 135mm temples if you are a female. It’s likely that, this size will fit easily.