eye glasses and contact lenseses and contact are devices that correct refractive errors in vision. lenses lenses are mounted mummy in frames worn on the face, sitting sfx mostly on the ears and nose, so that the lenses are positioned in front theatrical of the eyes. contact appear to be worn in direct contact with the cornea, but they actually float on a layer of tears that separates them from the cornea.purposethe purpose of lenseses and contact is to correct or improve the vision of people with nearsightedness (myopia), farsightedness (hyperopia), presbyopia, and astigmatism.precautions people allergic to certain plastics mummy should not wear contact or lenses frames or lenses manufactured from that type of plastic. people allergic to nickel should not wear flexon frames. people at risk of being in accidents that might shatter glass lenses should wear plastic lenses, preferably polycarbonate.

eye glasses and contact lenseses and contact are devices that correct refractive errors in vision. lenses lenses are mounted mummy in frames worn on the face, sitting sfx mostly on the ears and nose, so that the lenses are positioned in front theatrical of the eyes. contact appear to be worn in direct contact with the cornea, but they actually float on a layer of tears that separates them from the cornea.purposethe purpose of lenseses and contact is to correct or improve the vision of people with nearsightedness (myopia), farsightedness (hyperopia), presbyopia, and astigmatism.precautions people allergic to certain plastics mummy should not wear contact or lenses frames or lenses manufactured from that type of plastic. people allergic to nickel should not wear flexon frames. people at risk of being in accidents that might shatter glass lenses should wear plastic lenses, preferably polycarbonate.