In the first place, do opthalmic test for your eyes in sound glasses shops. The optometrist will prescribe a receipt of glasses. It is important to note that: it is necessary for you to get a professioanl guy to help you when you purchase reading eyeglasses online to ensure you buy a pair of accurate reading glasses whose lenses's centre coincides with your eyes' centre.
Regarding the quality of prescription eyeglasses frame, you can decide mainly on these conditions below:
* The glasses frame of good flexibility is good quality generally.
* The coating of quality frames should be bright and smooth.
* Frames with small, smooth and uniform solder joints means good quality.
* What components and parts assemble closely is good.
* The two lenses should be totally the same in the size and shape, and the symmetrical nosepiece is required.
When the old man choose the eyeglasses , one can choose either single vision lenses or bifocals. and the glass should be good photopermeability as principle. However, the lens of the old people is increasingly hardening. And the accommodation power attenuates, and the intraocular tissue is aging. To retard myopia to see the far and near more clearly. You may chooce bifocal lens or asymptotic lens to wear. It is beneficial to protect the eyes.
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