Experimental research in the significance of amplification, distance and beam width in the measurement of lens thickness by ultrasound.
D000818:Animals; D001699:Biometry; D007908:Lens, Crystalline / Q000033:anatomy & histology*; D008722:Methods; D011199:Potentiometry; D012029:Refraction, Ocular; D013552:Swine; D014159:Transducers; D014465:Ultrasonics