(lenses crazy 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 fire of receiving electric shock should avoid metal frames.people employed in certain occupations may be prohibited from wearing contact, contact or may be required to wear safety eyewear over the contact. some occupations, such as construction or auto repair, may require safety lenses lenses and safety frames. physicians and employers should be consulted for recommendations. sfx description theatrical 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 crazy optician. a separate lenses-fitting exam is necessary if the patient wants contact, because an lenses prescription is not the same as a lenses prescription.

(lenses crazy 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 fire of receiving electric shock should avoid metal frames.people employed in certain occupations may be prohibited from wearing contact, contact or may be required to wear safety eyewear over the contact. some occupations, such as construction or auto repair, may require safety lenses lenses and safety frames. physicians and employers should be consulted for recommendations. sfx description theatrical 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 crazy optician. a separate lenses-fitting exam is necessary if the patient wants contact, because an lenses prescription is not the same as a lenses prescription.

the fire distance between the lenses is for a "standard" person. generally, this will not be a problem, but if a patient is sensitive or has more closely set eyes, for example, it may pose a problem. persons buying ready-made sunglasses or reading glasses should hold them up to see if they contact appear clear. they should also hold the lenses to see an object with straight lines reflected off of the lenses. if the lines don''t appear straight, lenses the lenses may be warped sfx or inferior.patients theatrical may sometimes need a few days to adjust to a new prescription; however, problems should be reported, because the glasses may need to be rechecked.contact