Evaluation for the Accuracy of the SRK/T Formula in PCL Implanted Patients(II): Optimizing, A-Constant.
- Author:
Ki Kong DO
1
;
Young Tae CHO
;
Do Yong LEE
Author Information
1. Department of Ophthalmology, Maryknoll Hospital.
- Publication Type:Original Article
- Keywords:
Holladay;
Optimizing of A-constant;
Original A-constant;
SRK/T
- MeSH:
Sutures
- From:Journal of the Korean Ophthalmological Society
1997;38(5):769-780
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
To evaluate the efficacy of optimizing of A-constant, the error in prediction was analyzed in three groups of eyes after posterior chamber lens implantation ; 102 eyes with bag placed, 66 eyes with simple sulcus places, and 25 eyes with sulcus placed with transscleral fixation suture. We compared the predictive accuracy of the SRK/T formula using optimized A-constant (bag-placed, sulcus-placed) derived from the 300 eyes with Holladay and SRK/T using original surgeon factor and A-constant. The SRK/T formula with optimized A-constant has a better mean relative, absolut, and standard error and has a better range of IOL prediction error, which was more accurate than other formulas without optimizing. In this study it is our recommendation that each surgeon use a different optimized A-constants for sulcus or bag placement to enhance the predictability of the postoperative refraction.
