J Korean Ophthalmol Soc > Volume 56(7); 2015 > Article
Journal of the Korean Ophthalmological Society 2015;56(7):1059-1064.
DOI: https://doi.org/10.3341/jkos.2015.56.7.1059    Published online July 15, 2015.
Comparison of the Postoperative Refractive Errors Measured by Ultrasound and Partial Coherence Interferometers after Phacovitrectomy.
Ju Hong Park, Seong Young Jeong, Myung Mi Kim, Woo Hyok Chang
Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Korea. changwh@ynu.ac.kr
유리체절제술과 수정체유화술 동시수술 시 접촉식초음파와 부분결합간섭계의 술 후 굴절력 예측 비교
영남대학교 의과대학 안과학교실
Received: 29 January 2015   • Revised: 4 March 2015   • Accepted: 4 June 2015
To compare the accuracy of refractive outcome measured by Ultrascan(R) (Alcon, Fort Worth, TX, USA) and partial coherence interferometers after phacovitrectomy. METHODS: We performed a retrospective study in 74 eyes of 74 patients who underwent phacovitrectomy. SRK-T formula was used to predict intraocular lens (IOL) power. The difference between the predicted and postoperative refractive outcomes for the 2 methodologies (Ultrascan(R) and IOL Master(R) [Zeiss, Carl Zeiss, Jena, Germany]) were compared. The predicted refractive outcome was defined as the estimated refractive error when the selected IOL was inserted. RESULTS: The axial length measured using IOL Master(R) was statistically longer than when measured using Ultrascan(R) (23.85 +/- 0.15 mm, 23.56 +/- 0.15 mm, p < 0.001). Based on keratometry, statistically significant difference between the 2 groups was not observed. The postoperative refractive error was more accurate when using the IOL Master(R) than Ultrascan(R) (0.08 +/- 0.74, 0.47 +/- 0.69, p < 0.001). However, in cases of vitreous hemorrhage, the postoperative refractive error was 0.42 +/- 0.49 with the IOL Master(R) and 0.07 +/- 0.54 with the Ultrascan(R). CONCLUSIONS: Generally, IOL Master(R) is a more accurate method for calculating the IOL power prior to phacovitrectomy. However, in cases of vitreous hemorrhage, Ultrascan(R) appears superior to IOL Master(R) when calculating the IOL power.
Key Words: IOL Master(R);Phacovitrecotmy;Refractive error;Ultrasound

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