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

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

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