The effect of corneal power on the accuracy of 14 IOL power formulas

Xu, Jialin; Zhang, Lu; Mo, Er; Zhu, Kaiyi; Zhu, Yitong; Feng, Ke; Wu, Zunting; Zheng, Yangran; Huang, Fang; Gong, Xianhui; Li, Jin

doi:10.1186/s12886-024-03395-9

BMC Ophthalmology

Table 3 Predictive outcomes of IOL calculation formulas according to corneal power

From: The effect of corneal power on the accuracy of 14 IOL power formulas

	BU II	Castrop	EVO 2.0	Hoffer QST	Cook K6	Kane	Karmona	Naeser 2	Olsen (OLCR)	Pearl-DGS	RBF 3.0	T2	VRF	VRF-G
Km<43.0D(n = 65)
PE	0.037	-0.048	0.014	-0.030	-0.031	-0.054	-0.137	-0.138	-0.139	-0.061	-0.037	0.020	-0.018	-0.047
SD	0.469	0.400	0.379 ^a,b	0.418 ^a	0.383 ^b	0.380 ^a	0.436	0.453	0.407	0.382	0.418	0.443	0.468	0.373^a
MAE	0.340	0.318	0.291	0.324	0.293	0.299	0.369	0.368	0.355	0.301	0.326	0.341	0.365	0.294
MedAE	0.243	0.291	0.265	0.280	0.242	0.293	0.299	0.266	0.292	0.239	0.281	0.299	0.303	0.229
Percentage of Eyes within Diopter Range Indicated
± 0.25D	50.77	41.54	47.69	47.69	52.31	46.15	44.62	47.69	44.62	52.31	47.69	47.69	43.08	52.31
±0.50D	78.46	81.54	84.62	76.92	83.08	86.15	75.38	70.77	75.38	80.00	81.54	73.85	70.77	81.54
± 0.75D	90.77	93.85	96.92	93.85	96.92	95.38	95.38	87.69	92.31	96.92	93.85	89.23	92.31	96.92
± 1.00D	95.38	96.92	98.46	98.46	96.92	98.46	95.38	96.92	98.46	98.46	98.46	95.38	98.46	98.46
43.0D ≤ Km<46D(n = 205)
PE	-0.010	0.005	0.007	0.016	0.007	0.010	0.016	0.003	0.007	-0.006	-0.003	0.008	0.015	0.004
SD	0.409 ^a,c	0.450	0.417 ^c	0.426	0.408 ^c,e	0.415 ^c	0.406	0.441	0.470	0.414 ^c,e	0.405 ^{a, c,d}	0.429	0.448	0.413
MAE	0.311 ^c,e	0.356	0.315 ^c,e	0.324	0.314 ^c,e	0.315 ^c,e	0.313 ^c,e	0.338	0.368	0.320 ^c,e	0.309 ^a,c	0.331	0.342	0.307 ^c,e
MedAE	0.233	0.276	0.233^c	0.269	0.234	0.227	0.249	0.252	0.308	0.248	0.239	0.267	0.267	0.235
Percentage of Eyes within Diopter Range Indicated
± 0.25D	55.61	46.34	56.10	49.76	51.71	53.17	52.20	50.73	43.41	53.17	52.68	49.27	49.27	52.68
±0.50D	79.51	72.68	75.61	79.02	77.56	76.59	78.54	78.05	74.15	76.59	80.00	76.10	75.12	80.98
± 0.75D	93.17	89.27	93.17	91.22	93.66	92.68	93.66	91.22	89.27	92.68	93.66	92.68	89.76	94.63
± 1.00D	98.54	97.56	98.05	96.59	98.05	97.07	98.54	96.59	96.10	98.05	98.05	96.59	97.07	97.07
Km ≥ 46D(n = 66)
PE	-0.008	0.049	-0.036	-0.021	0.013	0.022	0.109	0.145	0.116	0.078	0.048	-0.044	-0.025	0.043
SD	0.428	0.448	0.375	0.377	0.380	0.384	0.381	0.417	0.436	0.399	0.376	0.386	0.409	0.398
MAE	0.327	0.353	0.294	0.292	0.290^e	0.291 ^e	0.316	0.331	0.361	0.302	0.279 ^e	0.301	0.317	0.310
MedAE	0.278	0.28	0.234	0.231	0.221	0.228	0.215	0.248	0.292	0.194	0.185	0.236	0.26	0.257
Percentage of Eyes within Diopter Range Indicated
± 0.25D	48.48	45.45	54.55	54.55	54.55	56.06	57.58	51.52	43.94	56.06	60.61	53.03	50	51.52
±0.50D	77.27	77.27	83.33	83.33	84.85	78.79	81.82	78.79	72.73	80.30	83.33	84.85	78.79	83.33
± 0.75D	86.36	86.36	96.97	95.45	93.94	92.42	90.91	92.42	89.39	90.91	90.91	93.94	92.42	92.42
± 1.00D	98.48	95.45	98.48	100.00	98.48	98.48	98.48	95.45	98.48	100.00	100.00	98.48	98.48	98.48

a, Heteroscedastic test, significantly lower than VRF, P < 0.05
b, Heteroscedastic test, significantly lower than BUII, P < 0.015
c, Heteroscedastic test, significantly lower than Olsen (OLCR), P < 0.015
d, Heteroscedastic test, significantly lower than Naeser, P < 0.025
e, Heteroscedastic test, significantly lower than Castrop, P < 0.025

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ISSN: 1471-2415

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