(lenses theatrical made from polycarbonate, the same type of plastic green 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 goddess may be prohibited from wearing 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. contact physicians and employers should be consulted for recommendations. description lenses eyes are examined by optometrists (o.d.) or 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 contact, sfx because an lenses prescription is not the same as a lenses prescription.

(lenses theatrical made from polycarbonate, the same type of plastic green 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 goddess may be prohibited from wearing 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. contact physicians and employers should be consulted for recommendations. description lenses eyes are examined by optometrists (o.d.) or 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 contact, sfx because an lenses prescription is not the same as a lenses prescription.