A-scan ultrasound biometry - Misplaced Pages

(Redirected from A-scan) Diagnostic test used in optometry or ophthalmology

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Medical diagnostic method

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. 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.

References

Waldron, Rhonda G (2022-08-10). "A-Scan Biometry: Practice Essentials, Ultrasound Principles, Ultrasound Biometry Instrumentation". Medscape Reference. Retrieved 2024-08-10.
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.

Tests and procedures involving the eyes

Adnexa

Eyelids	Blepharoplasty East Asian blepharoplasty Epicanthoplasty Eyelid revision Hughes procedure Tarsorrhaphy
Lacrimal system	Dacryocystorhinostomy Punctoplasty

Globe

Refractive surgery	Alpins method Automated lamellar keratoplasty Conductive keratoplasty Corneal inlay Epikeratophakia Epi-LASIK Intrastromal corneal ring segment Keratomileusis Laser blended vision Laser eye surgery Laser thermal keratoplasty LASIK Contoura Vision Limbal relaxing incisions Phakic intraocular lens implantation Photorefractive keratectomy Radial keratotomy SMILE
Cataract surgery	Capsulorhexis Capsulotomy Glued intraocular lens Hydrodelineation Hydrodissection Intraocular lens scaffold Manual small incision cataract surgery Phacoemulsification Prechop
Retinal surgery	Ignipuncture Laser photocoagulation Scleral buckle
Glaucoma surgery	Cyclodestruction Excimer laser trabeculostomy Minimally invasive glaucoma surgery Trabeculectomy Trabeculoplasty
Transplantation	Whole eye transplantation Corneal transplantation Corneal button Descemet membrane endothelial keratoplasty Pre-Descemet's endothelial keratoplasty
Other	Anterior chamber paracentesis Boston keratoprosthesis Corneal collagen cross-linking Enucleation Conformer Evisceration Gundersen flap Intravitreal injection Iridectomy Peritomy Photodisruption Phototherapeutic keratectomy Pterygium Sclerotomy Vitrectomy

Plaque radiotherapy

History

Categories:

See also

References