Computation of emmetropizing and iseikonizing implant lenses by means of a pocket calculator

✍ Scribed by J. M. Thijssen

• Book ID: 104642728
• Publisher: Springer Netherlands
• Year: 1980
• Tongue: English
• Weight: 470 KB
• Volume: 2
• Category: Article
• ISSN: 0165-5701
• DOI: 10.1007/bf00149254

✦ Synopsis

The purpose of the paper is to describe a simplified mathematical scheme to calculate both the power of the emmetropizing lens implant, and the aniseikonia resulting from this lens, and the iseikonizing lens implant, with the spectacle refraction needed for emmetropization. The computations are correlated to the exact scheme as presented in a former paper and appear to fall within the limits of accuracy set by echographic biometry. The computations are performed by an inexpensive pocket calculator and are easily carried out. The combined yielding of the emmetropizing lens power, the aniseikonia produced by it, as well as the iseikonic lens brings an accurate prescription of a lens implant power into reach of every surgeon. A slightly modified program is available to perform similar calculations to estimate the power of a contact lens.