Article · Wikipedia archive · Last revised Jun 11, 2026

A-scan ultrasound biometry

A-scan ultrasound biometry, commonly referred to as an A-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.

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Jun 11, 2026
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A-scan ultrasound biometry
Purposediagnostic 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

See also

See also

References

References

  1. Waldron, Rhonda G (2022-08-10). "A-Scan Biometry: Practice Essentials, Ultrasound Principles, Ultrasound Biometry Instrumentation". Medscape Reference. Retrieved 2024-08-10.
  2. Petrella, Lorena; Perdigão, Fernando; Caixinha, Miguel; Santos, Mário; Lopes, Maria; Gomes, Marco; Santos, Jaime (2021). "A-scan ultrasound in ophthalmology: A simulation tool". Medical Engineering & Physics. 97: 18–24. doi:10.1016/j.medengphy.2021.09.005. PMID 34756334.