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1.
Transl Vis Sci Technol ; 10(13): 30, 2021 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-34817575

RESUMO

Purpose: To investigate the effects of indocyanine green (ICG) solution on the viability and cytolysis of human lens epithelial cells ex vivo. Methods: A total of 200 pieces of anterior capsules were obtained during cataract surgery, and 110 pieces of the anterior capsules were randomly divided into five groups and treated by immersion in different concentrations of ICG solution. The remaining 90 anterior capsules were also divided into five groups and treated with a combination of drug immersion and washing in balanced salt solution. Electron microscopy and trypan blue and eosin stains were used to analyze the cells. Percentage of dead, shedding, or living lens epithelial cells was estimated and used to demonstrate effects of the ICG on viability and cytolysis. Results: Compared with the control group, the percentage of dead and shedding lens epithelial cells increased while the percentage of living lens epithelial cells decreased in all the immersion groups. In the washing groups, the percentage of the living lens epithelial cells was 63.42% ± 2.49%, 54.04% ± 1.84%, 43.51% ± 2.63%, 29.21% ± 2.40%, and 15.73% ± 1.61% for the five groups and reflected a concentration-effect relationship. Electron microscopy showed that the higher the concentration of the ICG solution, the more severe the destruction of the lens epithelial cell structure. Conclusions: ICG could reduce the viability of the lens epithelial cells and promote cell cytolysis. Translational Relevance: Our study showed that ICG could directly reduce the viability of the lens epithelial cells in a concentration-dependent fashion, which can theoretically reduce the incidence of posterior capsule opacification.

2.
J Cataract Refract Surg ; 47(12): e66-e69, 2021 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-33929794

RESUMO

Implantation of an intraocular lens (IOL) after combined vitrectomy and cataract surgery is usually required to reduce postoperative refraction errors. However, because of the severe fibrosis of the anterior capsule and the adhesion between the anterior and posterior capsules, it is difficult to reopen the capsular bag to complete the secondary IOL implantation. In this study, a surgical approach is described for reopening the severe adhesion between capsules and removing the significant fibroproliferative membranous material by injecting ophthalmic viscosurgical device into the periphery of the capsular bag to separate the anterior and posterior capsules. The IOL was implanted into the capsular bag without any zonular rupture or posterior capsule tear. The position of the IOL was stable during postoperative follow-up up to 3 months. This procedure to open a severely fibrosis capsule was safe and effective.

3.
Int J Ophthalmol ; 8(3): 513-21, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26086000

RESUMO

AIM: To describe the clinical and imaging characteristics associated with focal choroidal excavation (FCE), analyze the possible complication, and interpret its probable etiopathogenesis. METHODS: Retrospective descriptive case series of 37 eyes of 32 patients with FCE. Findings of spectral-domain optical coherence tomography (SD-OCT), fluorescein angiography, indocyanine green angiography, and clinical features were analyzed. RESULTS: All patients were Chinese. Five patients (15.6%) were bilaterally involved. Patients' ages ranged from 7 to 66y. Refractive error ranged between +2.0 D and -11.0 D. Mean best-corrected visual acuity was 0.6 (range, 0.1 to 1.2). Fundus examinations exhibited mild-moderate localized pigmentary disturbances in the corresponding area of 17 eyes. Fluorescein angiography performed in 18 patients showed varying degrees of hyperfluorescence and hypofluorescence related to a range of retinal pigment epithelium (RPE) alterations. Indocyanine green angiography performed in 7 patients showed hypofluorescence at the excavation. SD-OCT demonstrated choroidal excavation in all 37 eyes. Twenty-nine eyes showed a single lesion of FCE, and three eyes showed 2-3 separated lesions. Fifteen eyes showed separation between the photoreceptor tips and RPE consistent with nonconforming FCE. Central serous chorioretinopathy (CSC, n=1) and choroidal neovascularization (CNV, n=1) developed during follow-up. CONCLUSION: FCE could be interpreted as congenital focal choroidal dysplasia involving the RPE, choriocapillaris, and photoreceptor associated with the faulty anatomy. The abnormal anatomy of FCE was similar to anatomy at risk of CSC and CNV.

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