Intraocular Lens Power Calculations Using Dual Scheimpflug Analyzer.
10.3341/jkos.2016.57.3.369
- Author:
Young Bok LEE
1
;
Ka Young YI
;
So Hyun BAE
;
Ha Kyoung KIM
;
Joon Young HYON
;
Won Ryang WEE
;
Young Joo SHIN
Author Information
1. Department of Ophthalmology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea. schinn@hanmail.net
- Publication Type:Original Article
- Keywords:
Cataract surgery;
Dual Scheimpflug analyger;
Intraocular lens power calculation
- MeSH:
Anterior Chamber;
Biometry;
Cataract;
Cornea;
Humans;
Interferometry;
Lenses, Intraocular*;
Ultrasonography
- From:Journal of the Korean Ophthalmological Society
2016;57(3):369-379
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To investigate the accuracy of intraocular lens power calculations using simulated keratometry (simK) of dual Scheimpflug analyzer and 5 types of formulas in cataract patients. METHODS: The keratometry (K), axial length (AXL) and anterior chamber depth (ACD) were measured using ultrasound biometry (USB) combined with auto-keratometry (Auto-K), parital coherence interferometry (PCI; IOL master®) and dual Scheimpflug analyzer (DSA; Galilei®) in 39 eyes of 39 patients. Predicted refraction was calculated using Auto-K, mean K of PCI, and simK and total corneal power (TCP) of DSA in the Sanders-Retzlaff-Kraff (SRK-T) formula. The SRK-II, SRK-T, Holladay II, Haigis, and Hoffer-Q formula were used to calculate predicted refraction with the simK of DSA and AXL of USB. Manifest refraction, mean numerical error (MNE) and mean absolute error were evaluated 1, 3 and 6 months after cataract surgery. RESULTS: TCP of DSA was lower compared with other keratometric values (p < 0.05). The MNE was not different among Auto-K, mean K and simK. The MNE using TCP was larger compared with Auto-K, mean K and simK at 1 month after surgery (p < 0.05). There was a difference in MNE between simK and TCP of DSA at 6 months after surgery (p < 0.05). The MNE of SRK-T formula was the smallest in the intraocular lens (IOL) power calculation using the simK of DSA. CONCLUSIONS: We suggest using IOL power calculations with simK of DSA and SRK-T formula rather than TCP of DSA in cataract patients with normal corneas.
