(lenses made from polycarbonate, lenses the same type of sfx plastic used for the space shuttle windshield, are about 50 times stronger than other lens materials.) also, people at risk of receiving theatrical electric shock should avoid metal frames.people employed in certain occupations 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 crazy safety lenses and safety frames. physicians and employers should be consulted for recommendations. description 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 white glasses. the glasses are generally contact made by an optician. a separate lenses-fitting exam is necessary lenses if the patient sfx wants contact, because an lenses prescription is not the same as a lenses prescription.

(lenses made from polycarbonate, lenses the same type of sfx plastic used for the space shuttle windshield, are about 50 times stronger than other lens materials.) also, people at risk of receiving theatrical electric shock should avoid metal frames.people employed in certain occupations 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 crazy safety lenses and safety frames. physicians and employers should be consulted for recommendations. description 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 white glasses. the glasses are generally contact made by an optician. a separate lenses-fitting exam is necessary lenses if the patient sfx wants contact, because an lenses prescription is not the same as a lenses prescription.