Contact lenses.
D000368:Aged; D002648:Child; D003261:Contact Lenses / Q000009:adverse effects; D003262:Contact Lenses, Extended-Wear; D003263:Contact Lenses, Hydrophilic; D005128:Eye Diseases / Q000209:etiology; D006801:Humans; D006920:Hygiene; D006967:Hypersensitivity / Q000209:etiology; D007223:Infant; D008297:Male; D009216:Myopia / Q000628:therapy; D011305:Presbyopia / Q000628:therapy; D013666:Tears / Q000378:metabolism