Ultrasonography and Biometry – A-Scan Biometry Scan Biometry (2023) Dr Adel Abdelshafik

Description

Analysis of A-Scan Biometry principles, covering factors affecting spike height and sound absorption (e.g., density and angle of incidence). The material details standard average measurements (K reading, axial length, AC depth) and discusses proper measurement techniques for different eye types (phakic, aphakic, pseudophakic), focusing on correcting velocity differences for various IOL materials. Includes guidance on selecting appropriate IOL formulas (Hoffer Q, SRK/T, Holladay II) based on axial length and methods for identifying common sources of measurement error.