Retinal vasculature in glaucoma: a review

被引:125
作者
Chan, Karen K. W. [1 ,2 ,3 ]
Tang, Fangyao [1 ]
Tham, Clement C. Y. [1 ]
Young, Alvin L. [1 ,2 ,3 ]
Cheung, Carol Y. [1 ]
机构
[1] Chinese Univ Hong Kong, Dept Optometry & Visual Sci, Hong Kong, Hong Kong, Peoples R China
[2] Prince Wales Hosp, Dept Optometry & Visual Sci, Hong Kong, Hong Kong, Peoples R China
[3] Alice Ho Miu Ling Nethersole Hosp, Hong Kong, Hong Kong, Peoples R China
关键词
D O I
10.1136/bmjophth-2016-000032
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Despite the critical impact of glaucoma on global blindness, its aetiology is not fully characterised. Elevated intraocular pressure is highly associated with glaucomatous optic neuropathy. However, visual field loss still progresses in some patients with normal or even low intraocular pressure. Vascular factors have been suggested to play a role in glaucoma development, based on numerous studies showing associations of glaucoma with blood pressure, ocular perfusion pressure, vasospasm, cardiovascular disease and ocular blood flow. As the retinal vasculature is the only part of the human circulation that readily allows non-invasive visualisation of the microcirculation, a number of quantitative retinal vascular parameters measured from retinal photographs using computer software (eg, calibre, fractal dimension, tortuosity and branching angle) are currently being explored for any association with glaucoma and its progression. Several population-based and clinical studies have reported that changes in retinal vasculature (eg, retinal arteriolar narrowing and decreased fractal dimension) are associated with optic nerve damage and glaucoma, supporting the vascular theory of glaucoma pathogenesis. This review summarises recent findings on the relationships between quantitatively measured structural retinal vascular changes with glaucoma and other markers of optic nerve head damage, including retinal nerve fibre layer thickness. Clinical implications, recent new advances in retinal vascular imaging (eg, optical coherence tomography angiography) and future research directions are also discussed.
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页数:14
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