Comparison of Corneal Power and Astigmatism between Simulated Keratometry, True Net Power, and Total Corneal Refractive Power before and after SMILE Surgery
Joint Authors
Naidu, Rajeev K.
Zhou, Xingtao
Qian, Yishan
Liu, Yan
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-03-22
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Purpose.
To compare the mean corneal power (Km) and total astigmatism (Ka) estimated by three methods: simulated keratometry (simK), true net power (TNP), and total corneal refractive power (TCRP) before and after femtosecond laser small incision lenticule extraction (SMILE) surgery.
Methods.
A retrospective, cross-sectional study.
SimK, TNP, and TCRP from a Scheimpflug analyzer were obtained from 144 patients before and 6 months after SMILE surgery.
Km and Ka were recorded as the mean of individual paracentral rings of 1.0 to 8.0 mm (R1 to R8).
The surgically induced changes in Km (delta-simK, delta-TNP, and delta-TCRP) and Ka (delta-simKa, delta-TNPa, and delta-TCRPa) were compared to the changes in spherical equivalent of the cycloplegic refraction (delta-SE) and astigmatism (delta-RA).
Results.
Preoperatively, astigmatism values were greatest with simKa from R1 to R5 and greatest with TCRPa from R6 to R8.
Astigmatism values were smallest with TNPa from R1 to R7.
Postoperatively, astigmatism values were greatest with simKa from R1 to R5 and greatest with TCRPa from R6 to R8.
Delta-TCRP3 and Delta-TCRP4 matched delta-SE most closely, and delta-TCRPa3 matched delta-RA most closely.
Conclusions.
TCRP proved to be the most accurate method in estimating corneal power and astigmatism both before and after SMILE surgery.
American Psychological Association (APA)
Qian, Yishan& Liu, Yan& Zhou, Xingtao& Naidu, Rajeev K.. 2017. Comparison of Corneal Power and Astigmatism between Simulated Keratometry, True Net Power, and Total Corneal Refractive Power before and after SMILE Surgery. Journal of Ophthalmology،Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1185680
Modern Language Association (MLA)
Qian, Yishan…[et al.]. Comparison of Corneal Power and Astigmatism between Simulated Keratometry, True Net Power, and Total Corneal Refractive Power before and after SMILE Surgery. Journal of Ophthalmology No. 2017 (2017), pp.1-8.
https://search.emarefa.net/detail/BIM-1185680
American Medical Association (AMA)
Qian, Yishan& Liu, Yan& Zhou, Xingtao& Naidu, Rajeev K.. Comparison of Corneal Power and Astigmatism between Simulated Keratometry, True Net Power, and Total Corneal Refractive Power before and after SMILE Surgery. Journal of Ophthalmology. 2017. Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1185680
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1185680