Accuracy of intraocular lens calculations in eyes with keratoconus: Intraocular lens calculations in keratoconus

Mms Vandevenne; Vsc Webers; Mhm Segers; Ttjm Berendschot; D Zadok; M M Dickman; Rmma Nuijts; A Abulafia

doi:10.1097/j.jcrs.0000000000001088

Accuracy of intraocular lens calculations in eyes with keratoconus: Intraocular lens calculations in keratoconus

Mms Vandevenne^*, Vsc Webers, Mhm Segers, Ttjm Berendschot, D Zadok, M M Dickman, Rmma Nuijts, A Abulafia

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

PURPOSE: To compare the prediction accuracy of the Barrett True-K for keratoconus with standard formulas (SRK/T, Barrett Universal II and Kane) and the Kane keratoconus formula.

SETTING: Shaare Zedek Medical Center, Jerusalem, Israel and University Eye Clinic, Maastricht, the Netherlands.

DESIGN: Multicenter retrospective case-series.

METHODS: Eyes with stable keratoconus undergoing cataract surgery were included. The predicted refractions were calculated for: SRK/T, Barrett Universal II, Barrett True-K for keratoconus (predicted and measured), Kane, and Kane adjusted for keratoconus formulas. Primary outcomes were prediction error (PE), absolute error (AE), and percentage of eyes with PE ±0.25D, ±0.50D, and ±1.00D. Subgroup analyses were performed based on the severity of the keratoconus.

RESULTS: Fifty-seven eyes were included in the study. The PE was not significantly different from zero for SRK/T, Barrett True-K (predicted and measured), and Kane keratoconus formulas (range 0.09 to 0.22 D, p>0.05). The AE of Barrett True-K predicted (Median 0.14D) and Barrett True-K measured (Median 0.10D) were significantly lower from Barrett Universal II (Median 0.47D) and Kane (Median 0.50 D), p<0.001.

CONCLUSION: The Barrett True-K formulas for keratoconus had higher prediction accuracy as compared to new generation formulas and a similar prediction accuracy as compared to the Kane keratoconus formula.

Original language	English
Pages (from-to)	229-233
Journal	Journal of Cataract and Refractive Surgery
Volume	49
Issue number	3
Early online date	28 Oct 2022
DOIs	https://doi.org/10.1097/j.jcrs.0000000000001088
Publication status	Published - Mar 2023

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10.1097/j.jcrs.0000000000001088

Cite this

@article{8e9b8dd07b9c42bfa500494a107612bf,

title = "Accuracy of intraocular lens calculations in eyes with keratoconus: Intraocular lens calculations in keratoconus",

abstract = "PURPOSE: To compare the prediction accuracy of the Barrett True-K for keratoconus with standard formulas (SRK/T, Barrett Universal II and Kane) and the Kane keratoconus formula.SETTING: Shaare Zedek Medical Center, Jerusalem, Israel and University Eye Clinic, Maastricht, the Netherlands.DESIGN: Multicenter retrospective case-series.METHODS: Eyes with stable keratoconus undergoing cataract surgery were included. The predicted refractions were calculated for: SRK/T, Barrett Universal II, Barrett True-K for keratoconus (predicted and measured), Kane, and Kane adjusted for keratoconus formulas. Primary outcomes were prediction error (PE), absolute error (AE), and percentage of eyes with PE ±0.25D, ±0.50D, and ±1.00D. Subgroup analyses were performed based on the severity of the keratoconus.RESULTS: Fifty-seven eyes were included in the study. The PE was not significantly different from zero for SRK/T, Barrett True-K (predicted and measured), and Kane keratoconus formulas (range 0.09 to 0.22 D, p>0.05). The AE of Barrett True-K predicted (Median 0.14D) and Barrett True-K measured (Median 0.10D) were significantly lower from Barrett Universal II (Median 0.47D) and Kane (Median 0.50 D), p<0.001.CONCLUSION: The Barrett True-K formulas for keratoconus had higher prediction accuracy as compared to new generation formulas and a similar prediction accuracy as compared to the Kane keratoconus formula.",

author = "Mms Vandevenne and Vsc Webers and Mhm Segers and Ttjm Berendschot and D Zadok and Dickman, {M M} and Rmma Nuijts and A Abulafia",

note = "Copyright {\textcopyright} 2022 Published by Wolters Kluwer on behalf of ASCRS and ESCRS.",

year = "2023",

month = mar,

doi = "10.1097/j.jcrs.0000000000001088",

language = "English",

volume = "49",

pages = "229--233",

journal = "Journal of Cataract and Refractive Surgery",

issn = "0886-3350",

publisher = "Elsevier Science",

number = "3",

}

TY - JOUR

T1 - Accuracy of intraocular lens calculations in eyes with keratoconus

T2 - Intraocular lens calculations in keratoconus

AU - Vandevenne, Mms

AU - Webers, Vsc

AU - Segers, Mhm

AU - Berendschot, Ttjm

AU - Zadok, D

AU - Dickman, M M

AU - Nuijts, Rmma

AU - Abulafia, A

PY - 2023/3

Y1 - 2023/3

N2 - PURPOSE: To compare the prediction accuracy of the Barrett True-K for keratoconus with standard formulas (SRK/T, Barrett Universal II and Kane) and the Kane keratoconus formula.SETTING: Shaare Zedek Medical Center, Jerusalem, Israel and University Eye Clinic, Maastricht, the Netherlands.DESIGN: Multicenter retrospective case-series.METHODS: Eyes with stable keratoconus undergoing cataract surgery were included. The predicted refractions were calculated for: SRK/T, Barrett Universal II, Barrett True-K for keratoconus (predicted and measured), Kane, and Kane adjusted for keratoconus formulas. Primary outcomes were prediction error (PE), absolute error (AE), and percentage of eyes with PE ±0.25D, ±0.50D, and ±1.00D. Subgroup analyses were performed based on the severity of the keratoconus.RESULTS: Fifty-seven eyes were included in the study. The PE was not significantly different from zero for SRK/T, Barrett True-K (predicted and measured), and Kane keratoconus formulas (range 0.09 to 0.22 D, p>0.05). The AE of Barrett True-K predicted (Median 0.14D) and Barrett True-K measured (Median 0.10D) were significantly lower from Barrett Universal II (Median 0.47D) and Kane (Median 0.50 D), p<0.001.CONCLUSION: The Barrett True-K formulas for keratoconus had higher prediction accuracy as compared to new generation formulas and a similar prediction accuracy as compared to the Kane keratoconus formula.

AB - PURPOSE: To compare the prediction accuracy of the Barrett True-K for keratoconus with standard formulas (SRK/T, Barrett Universal II and Kane) and the Kane keratoconus formula.SETTING: Shaare Zedek Medical Center, Jerusalem, Israel and University Eye Clinic, Maastricht, the Netherlands.DESIGN: Multicenter retrospective case-series.METHODS: Eyes with stable keratoconus undergoing cataract surgery were included. The predicted refractions were calculated for: SRK/T, Barrett Universal II, Barrett True-K for keratoconus (predicted and measured), Kane, and Kane adjusted for keratoconus formulas. Primary outcomes were prediction error (PE), absolute error (AE), and percentage of eyes with PE ±0.25D, ±0.50D, and ±1.00D. Subgroup analyses were performed based on the severity of the keratoconus.RESULTS: Fifty-seven eyes were included in the study. The PE was not significantly different from zero for SRK/T, Barrett True-K (predicted and measured), and Kane keratoconus formulas (range 0.09 to 0.22 D, p>0.05). The AE of Barrett True-K predicted (Median 0.14D) and Barrett True-K measured (Median 0.10D) were significantly lower from Barrett Universal II (Median 0.47D) and Kane (Median 0.50 D), p<0.001.CONCLUSION: The Barrett True-K formulas for keratoconus had higher prediction accuracy as compared to new generation formulas and a similar prediction accuracy as compared to the Kane keratoconus formula.

U2 - 10.1097/j.jcrs.0000000000001088

DO - 10.1097/j.jcrs.0000000000001088

M3 - Article

C2 - 36314969

SN - 0886-3350

VL - 49

SP - 229

EP - 233

JO - Journal of Cataract and Refractive Surgery

JF - Journal of Cataract and Refractive Surgery

IS - 3

ER -