Calculating the Human Eye—Basics on Biometry

Abstract

With the invention and implantation of the first intraocular lens by Harold Ridley in 1949, the question arose as how the refractive power of artificial lenses could be determined. Optical biometry has revolutionised cataract surgery fundamentally from the introduction of the first optical biometer in 1999. Today, optical biometry is regarded as a standard diagnostic tool and an essential basis for IOL power calculation prior to cataract surgery, making it an indispensable part of ophthalmology. However, the ongoing improvement of optical biometry has led to patients having higher expectations regarding the refractive outcome after cataract surgery. As a result of the more precise measurement results possible with modern optical biometry, patients´ expectations can be met far better and prediction of postoperative refraction is much more accurate. Modern and sophisticated IOL concepts, such as EDOF lenses, accommodating lenses or applying the principle of monovision have become possible only through the use of optical biometry with its high reliability and enhanced IOL calculation strategies.