(lenses made from polycarbonate, the same 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 darth frames.people sfx employed in certain occupations may be prohibited from wearing contact, or may be required to wear safety eyewear over the contact. theatrical 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.) darth 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, because an lenses prescription is sfx not the same as a lenses prescription.

(lenses made from polycarbonate, the same 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 darth frames.people sfx employed in certain occupations may be prohibited from wearing contact, or may be required to wear safety eyewear over the contact. theatrical 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.) darth 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, because an lenses prescription is sfx not the same as a lenses prescription.