The accuracy of ultrasonic measurement of the axial length of the eye.
D000368:Aged; D001699:Biometry / Q000295:instrumentation* / Q000379:methods; D005123:Eye / Q000033:anatomy & histology*; D006801:Humans; D007910:Lenses, Intraocular / Q000592:standards*; D008875:Middle Aged; D014465:Ultrasonics / Q000295:instrumentation*