A-scan & B-scan

A-scan Ultrasound Biometry

Takes measurements of the eyeball axial length and performs intraocular lens power calculations. It is mainly used for dense cataract before surgery.

B-scan Ultrasonography

Produces two-dimensional cross-sectional views of the eye and the orbit. It is mainly used in the diagnosis and follow-up of vitreoretinal diseases.

(NIDEK– TOMEY)