title: The ophthalmetron. A clinical trial of accuracy.
mesh_terms: D001251:Astigmatism / Q000175:diagnosis; D006801:Humans; D008722:Methods; D009884:Ophthalmodynamometry / Q000295:instrumentation / Q000592:standards*; D009887:Ophthalmoscopy; D011680:Pupil / Q000033:anatomy & histology; D012029:Refraction, Ocular; D012160:Retina