A & B Ultrasound Ophthalmic Scanning

A Scan
A Scan is the use of sound waves to reveal the position of different structures within the eye and orbit in a one-dimensional display. It can be used to measure the length of eyeball, which is an essential figure to calculate the power of the artificial lens to be implanted during cataract surgery.

B Scan
B Scan is the use of ultrasound to produce a cross-sectional view of the retina and orbit. B Scan is particularly useful for patients with cataract or intra-ocular haemorrhage where direct viewing of retina is obstructed.