A-scan ultrasound biometry

Template:Short description Template:More medical citations needed Template:Infobox diagnostic A-scan ultrasound biometry, commonly referred to as an A-scan (short for Amplitude scan), uses an ultrasound instrument for diagnostic testing. 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.

See also

• B-scan ultrasonography
• Ultrasonography