Comparison of accuracy of intraocular lens calculation formulas in cataract eyes with prior radial keratotomy and axial length longer than 28mm
10.3980/j.issn.1672-5123.2023.9.29
- VernacularTitle:不同人工晶状体计算公式计算眼轴大于28mm的RK术后白内障患眼的准确性比较
- Author:
Ting-Ting TANG
1
,
2
,
3
,
4
;
Meng LI
1
,
2
,
3
,
4
;
Jing-Shang ZHANG
1
,
2
,
3
,
4
;
Xiu-Hua WAN
1
,
2
,
3
,
4
Author Information
1. School of Clinical Medicine, Weifang Medical University, Weifang 261053, Shandong Province, China
2. Beijing Tongren Hospital, Capital Medical University
3. Beijing Tongren Eye Center
4. Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing 100005, China
- Publication Type:Journal Article
- Keywords:
radial keratotomy;
cataract;
intraocular lens calculation formula;
high myopia
- From:
International Eye Science
2023;23(9):1568-1572
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To compare the accuracy of different intraocular lens(IOL)calculation formulas in cataract patients with axial length longer than 28mm and a history of radial keratotomy(RK).METHODS: Retrospective study. The medical records of 19 cataract patients(29 eyes)after RK and with axial length longer than 28mm who underwent cataract surgery from January 2011 to July 2020 in Beijing Tongren Hospital were analyzed. The absolute error(AE)of the difference among three different formulas was calculated. AE refers to the absolute value between the actual spherical equivalent after cataract surgery and the spherical equivalent predicted by the IOL formula. The AE values of the three formulas and the percentages of eyes with AE≤0.5, 0.75, 1.0, and 2.0D were calculated and compared.RESULTS: The AE values of the three formulas were significantly different(χ2=8.759, P=0.013). The Barrett True-K formula had the smallest median AE, which was only 0.62(0.20, 1.15)D, followed by the Haigis formula 0.76(0.34, 1.26)D, and the Holladay 1(D-K)formula had the largest 1.01(0.49, 1.62)D. The percentages of affected eyes with AE ≤0.5, 0.75, 1.0, and 2.0D for the Barrett True-K formula were 48%, 59%, 69%, and 93%, which were equal to or higher than the other two formulas.CONCLUSION: The Barrett True-K formula is more recommended among the three formulas for cataract patients after RK and with axial length longer than 28 mm.
