Understanding the A-Scan: How Doctors Measure Your Eye

An A-scan ultrasound (short for amplitude scan) is a specialized diagnostic test that uses high-frequency sound waves to measure the exact length and internal structures of your eye. While a standard eye chart measures how well you see, an A-scan acts like a sonar system to map out the physical geography of your eyeball. Why Doctors Use It

Biometry Ultrasound: The Ultimate A-Scan Guide – Liv Hospital