J Korean Ophthalmol Soc.  1986 Aug;27(4):531-536.

Optical Study of Posterior Chamber Intraocular Lens Implant Eyes Measured by Alpha 20/20 Biometric Ruler

• Kim HC
• Kim MS
• Kim JH

Abstract

The accuracy of prediction of postoperative refractive error was evaluated in 113 patients with extracapsular cataract extraction and posterior chamber intraocular lens. The method of calculating the IOL power was using the SRK formula. The refraction was done on 113 cases which could be followed up for more than 6 months. The results were as follows: 1. The best corrected and naked visual acuity of 0.5 or better was 98.2%, 77.9% respectively. 2. The mean spherical equivalent of postoperative corrective lens power was -0.86 +/- 41D. 3. Error of predicted required spectacle lens power was -0.67+/-0.4D. in relative average. With the use of the standard formula described by Hoffer, out results for the accuracy of intraocular lens calculation was 70.7% +/- 1.0D / 94.6% +/- 2.0D./ +2.51D. to -4.0D. 4. The mean axial length, keratametric power, anterior chamber depth, and predictable lens power of 113 cases was 23.85 +/- 16mm, 42.79 +/- 23D., 3.40 +/- 12mm, 18.53 +/- 67D. respectively.

MeSH Terms

Anterior Chamber
Cataract Extraction
Humans
Lenses, Intraocular*
Refractive Errors
Visual Acuity