Visual acuity and contrast sensitivity in different types of posterior capsule opacification

Ching Yu Cheng, May Yung Yen, Shih Jen Chen, Shu Ching Kao, Wen-Ming Hsu, Jorn Hon Liu

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Purpose: To compare the visual acuity (VA) and contrast sensitivity in 2 types of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium:YAG (Nd:YAG) capsulotomy and to evaluate vision test results after Nd:YAG capsulotomy. Setting: Department of Ophthalmology, Taipei Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan. Methods: Fourteen eyes with fibrosis-type PCO and 15 eyes with Elschnig-pearl-type PCO were enrolled prospectively. Before and 1 week after Nd:YAG capsulotomy, VA and contrast sensitivity were assessed using the illiterate E version of the Bailey-Lovie chart and the Vistech VCTS 6000 chart, respectively. Results: Before capsulotomy, the mean logMAR acuity in the group with Elschnig-pearl-type PCO was 0.47 ± 0.32 (SD) and in the group with fibrosis-type PCO, 0.17 ± 0.07. The difference between the 2 groups was significant (P = .002). After capsulotomy, there was no significant between-group difference (P > .05). Before capsulotomy, the contrast sensitivity was significantly worse (P < .01) at all spatial frequencies in the group with pearl-type PCO, especially at 6 cycles per degree. After capsulotomy, there was no significant between-group difference (P > .05) at any spatial frequency. Conclusions: After cataract surgery, patients with pearl-type PCO had lower VA and contrast sensitivity than those with fibrosis-type PCO. An Nd:YAG capsulotomy improved the VA and contrast sensitivity in patients with both types of PCO.

Original languageEnglish
Pages (from-to)1055-1060
Number of pages6
JournalJournal of Cataract and Refractive Surgery
Volume27
Issue number7
DOIs
Publication statusPublished - Jan 1 2001
Externally publishedYes

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Capsule Opacification
Contrast Sensitivity
Visual Acuity
Neodymium
Fibrosis
Vision Tests
Veterans Hospitals
Ophthalmology
Taiwan
General Hospitals
Cataract

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology
  • Sensory Systems

Cite this

Visual acuity and contrast sensitivity in different types of posterior capsule opacification. / Cheng, Ching Yu; Yen, May Yung; Chen, Shih Jen; Kao, Shu Ching; Hsu, Wen-Ming; Liu, Jorn Hon.

In: Journal of Cataract and Refractive Surgery, Vol. 27, No. 7, 01.01.2001, p. 1055-1060.

Research output: Contribution to journalArticle

Cheng, Ching Yu ; Yen, May Yung ; Chen, Shih Jen ; Kao, Shu Ching ; Hsu, Wen-Ming ; Liu, Jorn Hon. / Visual acuity and contrast sensitivity in different types of posterior capsule opacification. In: Journal of Cataract and Refractive Surgery. 2001 ; Vol. 27, No. 7. pp. 1055-1060.
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abstract = "Purpose: To compare the visual acuity (VA) and contrast sensitivity in 2 types of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium:YAG (Nd:YAG) capsulotomy and to evaluate vision test results after Nd:YAG capsulotomy. Setting: Department of Ophthalmology, Taipei Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan. Methods: Fourteen eyes with fibrosis-type PCO and 15 eyes with Elschnig-pearl-type PCO were enrolled prospectively. Before and 1 week after Nd:YAG capsulotomy, VA and contrast sensitivity were assessed using the illiterate E version of the Bailey-Lovie chart and the Vistech VCTS 6000 chart, respectively. Results: Before capsulotomy, the mean logMAR acuity in the group with Elschnig-pearl-type PCO was 0.47 ± 0.32 (SD) and in the group with fibrosis-type PCO, 0.17 ± 0.07. The difference between the 2 groups was significant (P = .002). After capsulotomy, there was no significant between-group difference (P > .05). Before capsulotomy, the contrast sensitivity was significantly worse (P < .01) at all spatial frequencies in the group with pearl-type PCO, especially at 6 cycles per degree. After capsulotomy, there was no significant between-group difference (P > .05) at any spatial frequency. Conclusions: After cataract surgery, patients with pearl-type PCO had lower VA and contrast sensitivity than those with fibrosis-type PCO. An Nd:YAG capsulotomy improved the VA and contrast sensitivity in patients with both types of PCO.",
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N2 - Purpose: To compare the visual acuity (VA) and contrast sensitivity in 2 types of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium:YAG (Nd:YAG) capsulotomy and to evaluate vision test results after Nd:YAG capsulotomy. Setting: Department of Ophthalmology, Taipei Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan. Methods: Fourteen eyes with fibrosis-type PCO and 15 eyes with Elschnig-pearl-type PCO were enrolled prospectively. Before and 1 week after Nd:YAG capsulotomy, VA and contrast sensitivity were assessed using the illiterate E version of the Bailey-Lovie chart and the Vistech VCTS 6000 chart, respectively. Results: Before capsulotomy, the mean logMAR acuity in the group with Elschnig-pearl-type PCO was 0.47 ± 0.32 (SD) and in the group with fibrosis-type PCO, 0.17 ± 0.07. The difference between the 2 groups was significant (P = .002). After capsulotomy, there was no significant between-group difference (P > .05). Before capsulotomy, the contrast sensitivity was significantly worse (P < .01) at all spatial frequencies in the group with pearl-type PCO, especially at 6 cycles per degree. After capsulotomy, there was no significant between-group difference (P > .05) at any spatial frequency. Conclusions: After cataract surgery, patients with pearl-type PCO had lower VA and contrast sensitivity than those with fibrosis-type PCO. An Nd:YAG capsulotomy improved the VA and contrast sensitivity in patients with both types of PCO.

AB - Purpose: To compare the visual acuity (VA) and contrast sensitivity in 2 types of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium:YAG (Nd:YAG) capsulotomy and to evaluate vision test results after Nd:YAG capsulotomy. Setting: Department of Ophthalmology, Taipei Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan. Methods: Fourteen eyes with fibrosis-type PCO and 15 eyes with Elschnig-pearl-type PCO were enrolled prospectively. Before and 1 week after Nd:YAG capsulotomy, VA and contrast sensitivity were assessed using the illiterate E version of the Bailey-Lovie chart and the Vistech VCTS 6000 chart, respectively. Results: Before capsulotomy, the mean logMAR acuity in the group with Elschnig-pearl-type PCO was 0.47 ± 0.32 (SD) and in the group with fibrosis-type PCO, 0.17 ± 0.07. The difference between the 2 groups was significant (P = .002). After capsulotomy, there was no significant between-group difference (P > .05). Before capsulotomy, the contrast sensitivity was significantly worse (P < .01) at all spatial frequencies in the group with pearl-type PCO, especially at 6 cycles per degree. After capsulotomy, there was no significant between-group difference (P > .05) at any spatial frequency. Conclusions: After cataract surgery, patients with pearl-type PCO had lower VA and contrast sensitivity than those with fibrosis-type PCO. An Nd:YAG capsulotomy improved the VA and contrast sensitivity in patients with both types of PCO.

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