Surgically induced astigmatism following trabeculectomy

Gyu Ah Kim, Si Hyung Lee, Sang Yeop Lee, Hee Jung Kwon, Hyoung Won Bae, Gong Je Seong, chanyun kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: Surgically induced astigmatism (SIA) has attracted much interest in recent times because changes in corneal astigmatism can lead to decreased uncorrected visual acuity and patient discomfort. This study aimed to evaluate SIA and to identify factors correlated therewith after trabeculectomy. Methods: We retrospectively reviewed medical charts of patients who were treated with trabeculectomy at 120° meridian (superotemporal area on right eye and superonasal area on left eye) by the same surgeon. Preoperative keratometric data were compared with data collected from 2 months to 12 months postoperatively. SIA was evaluated using Naeser's polar value analysis. Results: Using Naeser's method, ΔKP(120) was calculated as 0.7 ± 0.7 (0.82@104°), which indicates a with-the-rule change. After surgery, the combined mean polar values changed significantly (Hotelling T 2 = 22.47; p < 0.001). Multivariate analysis of variance indicated that postoperative intraocular pressure and location of surgery were independent factors that were significantly associated with SIA (p = 0.002 and 0.03, respectively). Conclusions: Trabeculectomy at the 120° meridian was not astigmatically neutral. In addition, the SIA after trabeculectomy appears to be greater in eyes with low postoperative intraocular pressure and a superonasal surgical wound rather than a superotemporal wound.

Original languageEnglish
Pages (from-to)1265-1270
Number of pages6
JournalEye (Basingstoke)
Volume32
Issue number7
DOIs
Publication statusPublished - 2018 Jul 1

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Trabeculectomy
Astigmatism
Meridians
Intraocular Pressure
Visual Acuity
Analysis of Variance
Multivariate Analysis
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems

Cite this

Kim, G. A., Lee, S. H., Lee, S. Y., Kwon, H. J., Bae, H. W., Seong, G. J., & kim, C. (2018). Surgically induced astigmatism following trabeculectomy. Eye (Basingstoke), 32(7), 1265-1270. https://doi.org/10.1038/s41433-018-0072-9
Kim, Gyu Ah ; Lee, Si Hyung ; Lee, Sang Yeop ; Kwon, Hee Jung ; Bae, Hyoung Won ; Seong, Gong Je ; kim, chanyun. / Surgically induced astigmatism following trabeculectomy. In: Eye (Basingstoke). 2018 ; Vol. 32, No. 7. pp. 1265-1270.
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Kim, GA, Lee, SH, Lee, SY, Kwon, HJ, Bae, HW, Seong, GJ & kim, C 2018, 'Surgically induced astigmatism following trabeculectomy', Eye (Basingstoke), vol. 32, no. 7, pp. 1265-1270. https://doi.org/10.1038/s41433-018-0072-9

Surgically induced astigmatism following trabeculectomy. / Kim, Gyu Ah; Lee, Si Hyung; Lee, Sang Yeop; Kwon, Hee Jung; Bae, Hyoung Won; Seong, Gong Je; kim, chanyun.

In: Eye (Basingstoke), Vol. 32, No. 7, 01.07.2018, p. 1265-1270.

Research output: Contribution to journalArticle

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AU - Kim, Gyu Ah

AU - Lee, Si Hyung

AU - Lee, Sang Yeop

AU - Kwon, Hee Jung

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AU - Seong, Gong Je

AU - kim, chanyun

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N2 - Purpose: Surgically induced astigmatism (SIA) has attracted much interest in recent times because changes in corneal astigmatism can lead to decreased uncorrected visual acuity and patient discomfort. This study aimed to evaluate SIA and to identify factors correlated therewith after trabeculectomy. Methods: We retrospectively reviewed medical charts of patients who were treated with trabeculectomy at 120° meridian (superotemporal area on right eye and superonasal area on left eye) by the same surgeon. Preoperative keratometric data were compared with data collected from 2 months to 12 months postoperatively. SIA was evaluated using Naeser's polar value analysis. Results: Using Naeser's method, ΔKP(120) was calculated as 0.7 ± 0.7 (0.82@104°), which indicates a with-the-rule change. After surgery, the combined mean polar values changed significantly (Hotelling T 2 = 22.47; p < 0.001). Multivariate analysis of variance indicated that postoperative intraocular pressure and location of surgery were independent factors that were significantly associated with SIA (p = 0.002 and 0.03, respectively). Conclusions: Trabeculectomy at the 120° meridian was not astigmatically neutral. In addition, the SIA after trabeculectomy appears to be greater in eyes with low postoperative intraocular pressure and a superonasal surgical wound rather than a superotemporal wound.

AB - Purpose: Surgically induced astigmatism (SIA) has attracted much interest in recent times because changes in corneal astigmatism can lead to decreased uncorrected visual acuity and patient discomfort. This study aimed to evaluate SIA and to identify factors correlated therewith after trabeculectomy. Methods: We retrospectively reviewed medical charts of patients who were treated with trabeculectomy at 120° meridian (superotemporal area on right eye and superonasal area on left eye) by the same surgeon. Preoperative keratometric data were compared with data collected from 2 months to 12 months postoperatively. SIA was evaluated using Naeser's polar value analysis. Results: Using Naeser's method, ΔKP(120) was calculated as 0.7 ± 0.7 (0.82@104°), which indicates a with-the-rule change. After surgery, the combined mean polar values changed significantly (Hotelling T 2 = 22.47; p < 0.001). Multivariate analysis of variance indicated that postoperative intraocular pressure and location of surgery were independent factors that were significantly associated with SIA (p = 0.002 and 0.03, respectively). Conclusions: Trabeculectomy at the 120° meridian was not astigmatically neutral. In addition, the SIA after trabeculectomy appears to be greater in eyes with low postoperative intraocular pressure and a superonasal surgical wound rather than a superotemporal wound.

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Kim GA, Lee SH, Lee SY, Kwon HJ, Bae HW, Seong GJ et al. Surgically induced astigmatism following trabeculectomy. Eye (Basingstoke). 2018 Jul 1;32(7):1265-1270. https://doi.org/10.1038/s41433-018-0072-9