Prevalence of Corneal Astigmatism Before Glaucoma Surgery in Chinese Patients With Primary Angle-closure Glaucoma
2017年10月30日 更新者：Mingkai Lin
Clear-lens extraction has been considered as first-line therapy for primary angle closure glaucoma(PACG) and application of toric intraocular lens (IOLs) leads to better postoperative visual acuity, yet little is known about the prevalence of corneal astigmatism in PACG patients.
We intend to make biometry examination for Chinese PACG patients, to obtain keratometry (K) , axial length (AL) and so on, and demographics data will also be recorded.
We will study the prevalence of corneal astigmatism before glaucoma surgery in Chinese patients with PACG.
Furthermore, differences of corneal astigmatism between primary angle-closure glaucoma and cataract patients will be explored.
Finally, the prevalence of corneal astigmatism before glaucoma surgery in Chinese patients with PACG will be portrayed and can be instructive to the IOLs' manufactering.
研究概览
详细说明
Biometry examination contains keratometry (K) , axial length (AL), central anterior chamber depth, visual field loss(mean deviation, MD), choroidal thickness(CT), range of goniosynechia, and stage of PACG.
Demographics data contains age, gender, and eye.
研究类型
观察性的
注册 (实际的)
808
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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Guangdong
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Guangzhou、Guangdong、中国、510060
- Zhongshan Ophthalmic Center
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
40年 至 100年 (成人、年长者)
接受健康志愿者
不
有资格学习的性别
全部
取样方法
非概率样本
研究人群
Primary angle closure was defi ned as iridotrabecular contact, either appositional or synechial, of at least 180° on gonioscopy, and primary angle-closure glaucoma as reproducible glaucomatous visual fi eld defects, glaucomatous optic neuropathy, or both, and intraocular pressure greater than 21 mm Hg on at least one occasion.
描述
Inclusion Criteria:
- Patients who are phakic and aged 40 years or older , and had newly diagnosed primary angle closure with intraocular pressure 30 mm Hg or greater or primary angle-closure glaucoma, will be recruited during preoperative screening at Zhongshan Ophthalmic Center.
Exclusion Criteria:
- Patients with corneal disease, irregular astigmatism, previous corneal or intraocular surgery, or a history of ocular inflammation will be excluded.
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Prevalence of corneal astigmatism
大体时间：During preoperative screening (1 day)
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Data of corneal astigmatism will be acquired through examination,and different types of corneal astigmatism will be diagnosed and seperated.Moreover,we will analyse the prevalence of corneal astigmatism,and compare among different age groups and different genders.Correlation between demographic features and data will be analysed,too.
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During preoperative screening (1 day)
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Prevalence of keratometry
大体时间：During preoperative screening (1 day)
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Flat,steep and mean keratometry will be examined before glaucoma surgery.
Moreover,we will analyse the prevalence of corneal astigmatism,and compare among different age groups and different genders.
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During preoperative screening (1 day)
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Prevalence of axial length
大体时间：During preoperative screening (1 day)
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Axial length will be measured by both IOL Master and A-scan, and data will be compared between different measurements,different genders and different age groups.
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During preoperative screening (1 day)
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
赞助
调查人员
- 首席研究员：Mingkai Lin, MD、Zhongshan Ophthalmic Center, Sun Yat-sen University
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
- Azuara-Blanco A, Burr J, Ramsay C, Cooper D, Foster PJ, Friedman DS, Scotland G, Javanbakht M, Cochrane C, Norrie J; EAGLE study group. Effectiveness of early lens extraction for the treatment of primary angle-closure glaucoma (EAGLE): a randomised controlled trial. Lancet. 2016 Oct 1;388(10052):1389-1397. doi: 10.1016/S0140-6736(16)30956-4.
- Gao X, Huang W, Wang W, Zhou M, Wang J, Du S, Chen S, Zhang X. Topographic profile of choroid in eyes after acute primary angle-closure. Can J Ophthalmol. 2016 Oct;51(5):354-361. doi: 10.1016/j.jcjo.2016.02.025. Epub 2016 Sep 3.
- Chen W, Zuo C, Chen C, Su J, Luo L, Congdon N, Liu Y. Prevalence of corneal astigmatism before cataract surgery in Chinese patients. J Cataract Refract Surg. 2013 Feb;39(2):188-92. doi: 10.1016/j.jcrs.2012.08.060. Epub 2012 Nov 7.
- Zuo C, Gong R, Chen W, Chen C, Su J, Wei K, Gao X, Lin M, Ge J. Investigation of Corneal Astigmatism in Chinese Patients With Primary Angle Closure Disease. J Glaucoma. 2018 Dec;27(12):1131-1135. doi: 10.1097/IJG.0000000000001061.
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始 (实际的)
2017年1月1日
初级完成 (实际的)
2017年8月31日
研究完成 (实际的)
2017年8月31日
研究注册日期
首次提交
2017年5月17日
首先提交符合 QC 标准的
2017年5月18日
首次发布 (实际的)
2017年5月19日
研究记录更新
最后更新发布 (实际的)
2017年10月31日
上次提交的符合 QC 标准的更新
2017年10月30日
最后验证
2017年10月1日
更多信息
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.
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