Plastic frames are durable, can accommodate just about any lens prescription, durasoft and are available in a wide range of prices. They are also offered in a variety of plastics (including 2 acrylic, epoxy, cellulose acetate, cellulose color propionate, polyamide, durasoft and nylon) and in different colors, shapes, and levels of resistance to breakage. 2 Epoxy frames are resilient and return color to their original shape after being deformed, so they do not need to be adjusted as frequently as other types. Nylon frames are almost unbreakable. They revert durasoft to their original shape after extreme trauma and distortion; because of this property, though, they 2 cannot be readjusted after they are manufactured.Fit The patient should color have the distance between the eyes (PD) measured, so that the optical centers of the lenses will be in front of the patient''s pupils. Bifocal heights also have to be measured with the chosen frame in place and adjusted on the patient. Again, this is so the lenses will be durasoft and 2 positioned correctly. If not positioned color correctly, the patient may experience durasoft eyestrain or other problems. This can occur with over-the-counter reading glasses.

Rimless frames are the least noticeable type, and they are lightweight 2 because the nosepiece and color temples are attached directly to the lenses, eliminating the weight of the rims. They tend to not be as sturdy as frames with rims, so they are not a good choice for people who frequently remove durasoft their glasses and put them on 2 again. color and durasoft They are also not very suitable for lenses that correct a high 2 degree of farsightedness, because such lenses are thin at the edges.Metal frames color are less noticeable than plastic, and they are durasoft lightweight. They are available in solid gold, 2 gold-filled, anodized aluminum, nickel, silver, stainless steel, and now titanium and titanium alloy. Until the late color 1980s, when titanium-nickel alloy and titanium frames were introduced, metal frames were, in general, more fragile durasoft than plastic frames. The titanium frames, however, are very strong and 2 lightweight. An alloy of titanium color and nickel, called durasoft Flexon, is not only strong and lightweight, but returns to its original shape after being twisted or dented. It is not perfect for everyone, 2 though, because some people are sensitive to its nickel. Flexon frames are also color relatively expensive.