Postoperative Refractive Errors after Posterior Capsulectomy during Combined Vitrectomy and Cataract Surgery

Jung Hoon Kim; Sang Beom Han; Seung Jun Lee; Moo Sang Kim

doi:10.7469/JKOS.2015.56.05.709

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Kim, Han, Lee, and Kim: Postoperative Refractive Errors after Posterior Capsulectomy during Combined Vitrectomy and Cataract Surgery

Original Article

J Korean Ophthalmol Soc 2015;56(5):709-714.

Published online: 7 September 2015

DOI: https://doi.org/10.7469/JKOS.2015.56.05.709

Postoperative Refractive Errors after Posterior Capsulectomy during Combined Vitrectomy and Cataract Surgery

Jung Hoon Kim, MD, Sang Beom Han, MD, Seung Jun Lee, MD, Moo Sang Kim, MD

Department of Ophthalmology, Kangwon National University School of Medicine, Chuncheon, Korea

￭ Address reprint requests to Moo Sang Kim, MD Department of Ophthalmology, Kangwon National University Hospital, #156 Baengnyeong-ro, Chuncheon 200-722, Korea Tel: 82-33-258-2014, Fax: 82-33-258-2191 E-mail: kimmoo-79@hanmail.net

Received 12 September 201419 November 2014 Accepted 20 April 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

초록

Purpose:

To evaluate the difference between the predicted and actual postoperative refractions after combined vitrectomy and cataract surgeries with a posterior capsulectomy.

Methods:

We performed a retrospective study of 33 eyes of 33 patients who underwent combined vitrectomy and cataract surgeries in our hospital between March 2013 and May 2014. The patients were divided into 2 groups: those who underwent a posterior capsulectomy (group A) and those who underwent combined vitrectomy and cataract surgeries (group B). The actual refractive errors were analyzed 3 months after surgery using spherical equivalent. We compared the results between the predicted and actual refractive errors in the two groups.

Results:

Group A consisted of 25 eyes of 25 patients and group B of 8 eyes of 8 patients. In group A, the average difference between predicted and actual postoperative refractive errors was -0.16 ± 0.38 D ( p = 0.083). The predicted refraction was -0.33 ±0.46 D and actual refraction was -0.49 ± 0.55 D in group A. There was no statistically significant difference between the predicted refraction and actual refractive errors in group A ( p = 0.083). In group B, the average difference between predicted and actual postoperative refractive errors was 0.27 ± 0.29 D ( p = 0.078). Additionally, the predicted refraction was -0.49 ± 0.77 D and actual refraction was -0.22 ± 0.59 D. The difference between the predicted refraction and actual refractive errors in group B was not statistically significant ( p = 0.078).

Conclusions:

When a posterior capsulectomy is performed during combined vitrectomy and cataract surgery, no significant difference in refractive errors between the predicted refraction and actual refractive errors was observed 3 months after surgery. Compared with combined vitrectomy and cataract surgeries only, a small amount of myopic refractive change tended to occur 3 months after surgery.

Keywords: Cataract surgery, Intraocular lens, Posterior capsulectomy, Refraction, Vitrectomy

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Table 1.

Baseline characteristics of phacovitrectomy with posterior capsulectomy group (group A) and without posterior capsulectomy group (group B)

Characteristics	Group A	Group B	p-value
Number (patients/eyes)	25/25	8/8	-
Age (years)	66.28 ± 10.43	59.50 ± 19.49	0.584^*
Sex (male/female)	15/10	7/1	-
Axial length (mm)	23.47 ± 0.81	24.03 ± 1.41	0.284^*
Preoperative keratometry (diopter)	44.45 ± 1.19	43.71 ± 1.27	0.172^*
Preoperative BCVA (log MAR)	0.46 ± 0.33	0.48 ± 0.32	0.832^*

Values are presented as mean ± SD unless otherwise indicated. BCVA = best-corrected visual acuity.

^* Mann-Whitney U test.

Table 2.

Preoperative best-corrected visual acuity (BCVA) and postoperative BCVA in phacovitrectomy with posterior capsulectomy group (group A) and without posterior capsulectomy group (group B) at 3 months after the operation

Preoperative BCVA (log MAR)	Group A (n = 25) 0.46 ± 0.33	Group B (n = 8) 0.48 ± 0.32	p-value 0.832^*
Postoperative BCVA (log MAR)	0.15 ± 0.11	0.14 ± 0.14	0.701^*

Values are presented as mean ± SD.

^* Mann-Whitney U test.

Table 3.

Predicted postoperative refraction and actual postoperative refraction in phacovitrectomy with posterior capsulectomy group (group A) and without posterior capsulectomy group (group B) at 3 months after the operation

	Group A (n = 25)	Group B (n = 8)
Predicted postoperative refraction (diopter)	-0.33 ± 0.46	-0.49 ± 0.77
Actual postoperative refraction (diopter)	-0.49 ± 0.55	-0.22 ± 0.59
Average difference (diopter)	-0.16 ± 0.38	0.27 ± 0.29
p-value^*	0.083	0.078

Values are presented as mean ± SD.

^* Wilcoxon signed rank test.

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