Source:http://linkedlifedata.com/resource/umls/id/C0015421
MSH: A pair of ophthalmic lenses in a frame or mounting which is supported by the nose and ears. The purpose is to aid or improve vision. It does not include goggles or nonprescription sun glasses for which EYE PROTECTIVE DEVICES is available.,UMD: Devices consisting of two lenses mounted in a frame that holds the lenses in an appropriate position before the eyes to assist vision. The metal or plastic frame is placed on the nose and is attached to two hinged legs that are supported by the ears. The lenses are usually graduated to improve the visual acuity of the user and may be configured as monofocal, bifocal, trifocal, or progressive. Eyeglasses are used mainly as a vision aid (i.e., corrective or assistive eyeglasses), but some dedicated eyeglasses are used to perform special tests (e.g., nystagmus), to protect the eye (e.g., sunglasses), or for aesthetic purposes.,NCI: Frames with lenses worn in front of the eye for vision correction, eye protection, or protection from UV rays.