rimless frames are the least noticeable type, contact and they are lightweight because the nosepiece lenses and 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 sfx their glasses and put them on again. they are also not very suitable for lenses that correct a high degree of farsightedness, because such lenses are thin at the edges.metal frames are less noticeable than plastic, and they are lightweight. they are theatrical available in solid gold, gold-filled, anodized aluminum, nickel, silver, stainless steel, and now titanium and titanium 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. an alloy of titanium and nickel, green called flexon, is not only strong and lightweight, but returns to its original shape after dollar being contact twisted or dented. it is not perfect for everyone, though, because some people are sensitive to its nickel. flexon frames are also relatively expensive.

rimless frames are the least noticeable type, contact and they are lightweight because the nosepiece lenses and 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 sfx their glasses and put them on again. they are also not very suitable for lenses that correct a high degree of farsightedness, because such lenses are thin at the edges.metal frames are less noticeable than plastic, and they are lightweight. they are theatrical available in solid gold, gold-filled, anodized aluminum, nickel, silver, stainless steel, and now titanium and titanium 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. an alloy of titanium and nickel, green called flexon, is not only strong and lightweight, but returns to its original shape after dollar being contact twisted or dented. it is not perfect for everyone, though, because some people are sensitive to its nickel. flexon frames are also relatively expensive.

(lenses lenses made from polycarbonate, the same sfx type of plastic used for the space shuttle windshield, are about 50 times stronger than other lens materials.) also, people at risk of receiving electric shock should avoid metal frames.people employed in certain occupations may be prohibited from wearing theatrical contact, or may be required to wear safety eyewear over the contact. some occupations, such as construction or auto repair, may require safety lenses and safety frames. physicians and employers should be consulted for recommendations. description eyes are examined by optometrists (o.d.) or green by ophthalmologists (m.d. or d.o.--doctor of osteopathy). prescriptions, if necessary, are then given to patients for glasses. the glasses are generally made by an optician. a separate lenses-fitting exam is necessary if the patient wants dollar contact, because an lenses prescription is not the same as a lenses prescription.