A-scan ultrasound biometry
(Redirected from A-scan)
 | This article needs more reliable medical references for verification or relies too heavily on primary sources. (August 2018) |
| A-scan ultrasound biometry | |
|---|---|
| Purpose | diagnostic test used in optometry |
A-scan ultrasound biometry, commonly referred to as an A-scan (short for Amplitude scan), uses an ultrasound instrument for diagnostic testing.[1] A-scan biometry measures the axial length (AL) of the eye prior to cataract surgery in order to assess the refractive power of the intraocular lens that will be implanted.[2]