rimless frames are the least noticeable type, and they are lightweight because the nosepiece red and temples are attached directly to the lenses, eliminating the weight sfx of the rims. they tend to not theatrical be as sturdy as frames with crazy rims, so they are not a good choice for people who frequently remove their glasses and put them on again. they are also not very suitable for lenses that correct a high degree spiral and red of farsightedness, because such lenses are thin at the edges.metal frames are less noticeable than plastic, and they are lightweight. they are available in solid gold, gold-filled, anodized aluminum, nickel, sfx silver, stainless steel, and now titanium and titanium alloy. until the late 1980s, when titanium-nickel theatrical alloy and titanium frames were introduced, metal frames were, in general, more crazy fragile than plastic frames. the titanium frames, however, are very strong and lightweight. an alloy of titanium and nickel, called flexon, is not only strong and lightweight, 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 spiral frames are also relatively expensive.

rimless frames are the least noticeable type, and they are lightweight because the nosepiece red and temples are attached directly to the lenses, eliminating the weight sfx of the rims. they tend to not theatrical be as sturdy as frames with crazy rims, so they are not a good choice for people who frequently remove their glasses and put them on again. they are also not very suitable for lenses that correct a high degree spiral and red of farsightedness, because such lenses are thin at the edges.metal frames are less noticeable than plastic, and they are lightweight. they are available in solid gold, gold-filled, anodized aluminum, nickel, sfx silver, stainless steel, and now titanium and titanium alloy. until the late 1980s, when titanium-nickel theatrical alloy and titanium frames were introduced, metal frames were, in general, more crazy fragile than plastic frames. the titanium frames, however, are very strong and lightweight. an alloy of titanium and nickel, called flexon, is not only strong and lightweight, 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 spiral frames are also relatively expensive.