Jan 27, 2011 · A-scan ultrasonography remains the standard technique for measuring axial length in IOL power calculation. In this series of videos, Sandra Frazier Byrne discusses the …

Three different A-scan biometry techniques are presently in use: Which is better, applanation or Immersion? Prager Shell used for Immersion A-scan A-scan biometry by immersion has better …

A-scan biometry, also referred to as A-scan, utilizes an ultrasound device for diagnostic testing. This device can determine the length of the eye and can be useful in diagnosing common sight...

Apr 14, 2020 · A more accurate way is to use immersion A-scan, which involves placing a saline-filled shell on the ocular surface so that the probe tip is immersed in fluid and not directly …

With the immersion A-scan technique, the probe tip does not come into contact with the cornea. Instead, the ultrasound beam is coupled to the eye through fluid. Because there is no corneal …

Routine A-scan biometry is an indispensable tool for ophthalmology, but has limitations in resolution and an inability to consistently direct the sound beam to a known location.

The immersion A-scan biometry uses a saline filled scleral (Prager) shell between the probe and the eye; it is relatively observer independent.

In this study, we compared axial length measure-ments obtained by optical biometry using the IOLMas-ter (Zeiss Humphrey Systems) and by immersion ultrasound using the Axis II …

The immersion technique described herein can be used with any ultrasound unit equipped with a solid A-scan probe and mobile electronic gates.

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 …