A-scan ultrasound biometry
Diagnostic test used in optometry or ophthalmology
| 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]
See also
- B-scan ultrasonography
- Ultrasonography
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.
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- t
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Tests and procedures involving the eyes
- Anesthesia for eye surgery
- Eye surgery
- Oculoplastics
- Eye examination
| Eyelids |
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|---|---|
| Lacrimal system |
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| Refractive surgery |
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|---|---|
| Cataract surgery | |
| Retinal surgery | |
| Glaucoma surgery | |
| Transplantation | |
| Other |
muscles
imaging
examination
therapy
- Couching
- Cryoextraction
