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Lu C, Yu S, Song H, Zhao Y, Xie S, Tang X, Yuan X. Posterior capsular opacification comparison between morphology and objective visual function. BMC Ophthalmol 2019; 19:40. [PMID: 30717688 PMCID: PMC6360676 DOI: 10.1186/s12886-019-1051-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 01/29/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND To compare the influence of posterior capsule opacification (PCO) morphology and severity on intraocular stray light and visual function with different levels of contrast. METHODS Forty-five patients diagnosed with PCO were included in this prospective consecutive case series. The Optical Quality Analysis System II (OQAS II) was adopted to assess the objective visual function including objective scatter index (OSI) and optical quality analysis system values (OVs) with 100, 20, and 9% contrast. RTVue-100 OCT was used to evaluate the PCO morphology and severity. Comparisons among visual function, morphology, and severity between pear type and fibrosis PCO were performed. The correlations among the PCO morphology, severity, OSI, and OVs were also determined. RESULTS There was a significant correlation between increased OSI and decreased visual acuity in PCO patients before laser capsulotomy. The changes of OSI were also correlated with the PCO area for the 3 mm IOL optic region (r = 0.43, p = 0.02). The OSI was significantly higher in pear type PCO when compared with fibrosis PCO (Z = - 4.06, p ≤ 0.001). In addition, the increased OSI in pear type PCO was significantly correlated with the 100% OVs and the 20% OVs but not with the 9% OVs. In fibrosis PCO, OSI was only correlated with the 100% OVs and the 20% OVs pre-YAG. CONCLUSIONS OSI and OVs could objectively indicate the visual function impairment in PCO patients. Effects of PCO on light scattering and on objective visual function might be explained by the variations of morphology and severity.
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Affiliation(s)
- Chengzhe Lu
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China
| | - Shasha Yu
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China
| | - Hui Song
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China
| | - Yun Zhao
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China
| | - Shiyong Xie
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China
| | - Xin Tang
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China.,Tianjin Eye Institute, Tianjin, China.,Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, China.,Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, 300020, China
| | - Xiaoyong Yuan
- Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China. .,Tianjin Eye Institute, Tianjin, China. .,Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, China. .,Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, 300020, China.
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