Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients
Joint Authors
Borrelli, Maria
De Bernardo, Maddalena
Rosa, Nicola
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-02-11
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Abstract EN
Purpose.
To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK).
Methods.
A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 right eyes.
The Pearson index and paired t-test were utilized for statistical analysis.
Results.
The differences between Kpre and those obtained with the other methods were as follows: 0.61 ± 0.94 D (range: −3.94 to 2.05 D, p<0.01) subtracting the effective treatment, 0.01 ± 0.86 D (range: −2.61 to 2.34 D, p=0.82) with Rosa’s formula, −0.02 ± 1.31 D (range: −3.43 to 3.68 D, p=0.82) with the current study formula, and −0.43 ± 1.40 D (range: −3.98 to 3.12 D, p<0.01) utilizing a mean K (Km) of 43.5 D.
Conclusions.
These formulas may permit the utilization of history-based methods, that is, the double-K method in calculating the IOL power following PRK when Kpre are unknown.
American Psychological Association (APA)
Rosa, Nicola& De Bernardo, Maddalena& Borrelli, Maria. 2018. Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients. Journal of Ophthalmology،Vol. 2018, no. 2018, pp.1-5.
https://search.emarefa.net/detail/BIM-1196430
Modern Language Association (MLA)
Rosa, Nicola…[et al.]. Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients. Journal of Ophthalmology No. 2018 (2018), pp.1-5.
https://search.emarefa.net/detail/BIM-1196430
American Medical Association (AMA)
Rosa, Nicola& De Bernardo, Maddalena& Borrelli, Maria. Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients. Journal of Ophthalmology. 2018. Vol. 2018, no. 2018, pp.1-5.
https://search.emarefa.net/detail/BIM-1196430
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196430