Multifocal I.O.L
A-scan ultrasound biometry, commonly referred to as an A-scan (short for Amplitude scan), is a routine type of diagnostic test used in optometry or ophthalmology. The A-scan provides data on the length of the eye, which is a major determinant in common sight disorders.
What is Multifocal IOL?
Multifocal IOLs are a type of prosthetic lens used in cataract surgery. Some patients choose to have this lens placed before they have developed cataracts, a procedure known as a refractive lens exchange.
During cataract or lens replacement surgery, the patient’s natural lenses are replaced with multifocal IOLs. These new lenses improve near, intermediate, and far-distance vision.
Etched onto the surface of the multifocal lens are concentric rings, which allow images at a variety of distances to focus on the retina. Ultimately, multifocal IOLs provide restored visual function and reduce or eliminate the need to wear corrective eyewear.
How does a multifocal IOL work?
Most multifocal IOLs work like an “in-house” bifocal lens for the eye to accurately distribute light at any focal point, creating clear vision at any distance. The lens provides near and far vision capability at the same time at all times.