Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open-angle glaucoma

Hyoung Won Bae, Yun Ha Lee, Do Wook Kim, Taekjune Lee, Samin Hong, Gong Je Seong, Chan Yun Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background: The objective of the study is to examine the effect of trabeculectomy on intraocular lens power calculations in patients with open-angle glaucoma (OAG) undergoing cataract surgery. Design: The design is retrospective data analysis. Participants: There are a total of 55 eyes of 55 patients with OAG who had a cataract surgery alone or in combination with trabeculectomy. Methods: We classified OAG subjects into the following groups based on surgical history: only cataract surgery (OC group), cataract surgery after prior trabeculectomy (CAT group), and cataract surgery performed in combination with trabeculectomy (CCT group). Main Outcome Measures: Differences between actual and predicted postoperative refractive error. Results: Mean error (ME, difference between postoperative and predicted SE) in the CCT group was significantly lower (towards myopia) than that of the OC group (P = 0.008). Additionally, mean absolute error (MAE, absolute value of ME) in the CAT group was significantly greater than in the OC group (P = 0.006). Using linear mixed models, the ME calculated with the SRK II formula was more accurate than the ME predicted by the SRK T formula in the CAT (P = 0.032) and CCT (P = 0.035) groups. Conclusions: The intraocular lens power prediction accuracy was lower in the CAT and CCT groups than in the OC group. The prediction error was greater in the CAT group than in the OC group, and the direction of the prediction error tended to be towards myopia in the CCT group. The SRK II formula may be more accurate in predicting residual refractive error in the CAT and CCT groups.

Original languageEnglish
Pages (from-to)465-471
Number of pages7
JournalClinical and Experimental Ophthalmology
Volume44
Issue number6
DOIs
Publication statusPublished - 2016 Aug 1

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Trabeculectomy
Open Angle Glaucoma
Intraocular Lenses
Cataract
Refractive Errors
Myopia
Linear Models
History
Outcome Assessment (Health Care)

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

Bae, Hyoung Won ; Lee, Yun Ha ; Kim, Do Wook ; Lee, Taekjune ; Hong, Samin ; Seong, Gong Je ; Kim, Chan Yun. / Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open-angle glaucoma. In: Clinical and Experimental Ophthalmology. 2016 ; Vol. 44, No. 6. pp. 465-471.
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Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open-angle glaucoma. / Bae, Hyoung Won; Lee, Yun Ha; Kim, Do Wook; Lee, Taekjune; Hong, Samin; Seong, Gong Je; Kim, Chan Yun.

In: Clinical and Experimental Ophthalmology, Vol. 44, No. 6, 01.08.2016, p. 465-471.

Research output: Contribution to journalArticle

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T1 - Effect of trabeculectomy on the accuracy of intraocular lens calculations in patients with open-angle glaucoma

AU - Bae, Hyoung Won

AU - Lee, Yun Ha

AU - Kim, Do Wook

AU - Lee, Taekjune

AU - Hong, Samin

AU - Seong, Gong Je

AU - Kim, Chan Yun

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N2 - Background: The objective of the study is to examine the effect of trabeculectomy on intraocular lens power calculations in patients with open-angle glaucoma (OAG) undergoing cataract surgery. Design: The design is retrospective data analysis. Participants: There are a total of 55 eyes of 55 patients with OAG who had a cataract surgery alone or in combination with trabeculectomy. Methods: We classified OAG subjects into the following groups based on surgical history: only cataract surgery (OC group), cataract surgery after prior trabeculectomy (CAT group), and cataract surgery performed in combination with trabeculectomy (CCT group). Main Outcome Measures: Differences between actual and predicted postoperative refractive error. Results: Mean error (ME, difference between postoperative and predicted SE) in the CCT group was significantly lower (towards myopia) than that of the OC group (P = 0.008). Additionally, mean absolute error (MAE, absolute value of ME) in the CAT group was significantly greater than in the OC group (P = 0.006). Using linear mixed models, the ME calculated with the SRK II formula was more accurate than the ME predicted by the SRK T formula in the CAT (P = 0.032) and CCT (P = 0.035) groups. Conclusions: The intraocular lens power prediction accuracy was lower in the CAT and CCT groups than in the OC group. The prediction error was greater in the CAT group than in the OC group, and the direction of the prediction error tended to be towards myopia in the CCT group. The SRK II formula may be more accurate in predicting residual refractive error in the CAT and CCT groups.

AB - Background: The objective of the study is to examine the effect of trabeculectomy on intraocular lens power calculations in patients with open-angle glaucoma (OAG) undergoing cataract surgery. Design: The design is retrospective data analysis. Participants: There are a total of 55 eyes of 55 patients with OAG who had a cataract surgery alone or in combination with trabeculectomy. Methods: We classified OAG subjects into the following groups based on surgical history: only cataract surgery (OC group), cataract surgery after prior trabeculectomy (CAT group), and cataract surgery performed in combination with trabeculectomy (CCT group). Main Outcome Measures: Differences between actual and predicted postoperative refractive error. Results: Mean error (ME, difference between postoperative and predicted SE) in the CCT group was significantly lower (towards myopia) than that of the OC group (P = 0.008). Additionally, mean absolute error (MAE, absolute value of ME) in the CAT group was significantly greater than in the OC group (P = 0.006). Using linear mixed models, the ME calculated with the SRK II formula was more accurate than the ME predicted by the SRK T formula in the CAT (P = 0.032) and CCT (P = 0.035) groups. Conclusions: The intraocular lens power prediction accuracy was lower in the CAT and CCT groups than in the OC group. The prediction error was greater in the CAT group than in the OC group, and the direction of the prediction error tended to be towards myopia in the CCT group. The SRK II formula may be more accurate in predicting residual refractive error in the CAT and CCT groups.

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