[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address Please contact the publisher to request reinstatement.
[Skip to Content Landing]
August 1987

Intraocular Lens Power CalculationsAn Extra Edge or Expensive Waste?

Author Affiliations

Salt Lake City

Arch Ophthalmol. 1987;105(8):1035-1036. doi:10.1001/archopht.1987.01060080037022

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


How important is biometry? Most of us who perform intraocular lens (IOL) implantation have basically accepted it as the "gospel truth" without much discussion. Nobody wants to face the unhappy patient with aniseikonia or a markedly myopic or hyperopic refraction. It simply makes sense to do whatever is necessary to avoid these types of complications. Lo and behold, however, in this issue of the Archives is an iconoclastic article by Singh and Sommer1 suggesting that a standard 20-diopter (D) IOL for patients who have a preoperative refractive error of ± 4.5 D will produce a result just about as good. Their report is based on the results obtained by four experienced surgeons and, in my opinion, it simply cannot be dismissed out of hand.

See also p 1046.

So what do we do? Is it time to pitch A-scan apparatuses into the secondary junk market? There is no question

Singh K, Sommer A:  Intraocular lens power calculations: A practical evaluation in normal subjects at the Wilmer Institute . Arch Ophthalmol 1987;105:1046-1050.Article
Richards SC, Olson RJ, Richards WL, et al:  Clinical evaluation of six intraocular lens calculation formulas . Am Intra-Ocular Implant Soc J 1985;11:153-158.Article
Richards SC, Olson RJ, Richards WL:  Factors associated with poor predictability by intraocular lens calculation formulas . Arch Ophthalmol 1985;103:515-518.Article