A study of lens construction and use.
D002386:Cataract; D005139:Eyeglasses; D005260:Female; D005313:Fetal Death / Q000175:diagnosis; D006801:Humans; D007909:Lenses / Q000145:classification; D008433:Mathematics; D009216:Myopia / Q000534:rehabilitation; D055095:Optics and Photonics; D011187:Posture; D011247:Pregnancy; D011932:Reading; D012029:Refraction, Ocular / Q000295:instrumentation; D012030:Refractive Errors / Q000534:rehabilitation*; D013672:Technology; D009626:Terminology as Topic