title: A DEVICE FOR TEACHING REFRATION.
mesh_terms: D001296:Audiovisual Aids; D004493:Education; D005123:Eye; D006257:Head; D006801:Humans; D013508:Ophthalmologic Surgical Procedures; D012029:Refraction, Ocular; D014787:Vision Tests
keywords: AUDIO-VISUAL AIDS; EDUCATION; REFRACTION, OCULAR