title: Aqueous Humor Outflow Structure and Function Imaging At the Bench and Bedside: A Review.
abstract: Anterior segment glaucoma clinical care and research has recently gained new focus because of novel imaging modalities and the advent of angle-based surgical treatments. Traditional investigation drawn to the trabecular meshwork now emphasizes the entire conventional aqueous humor outflow (AHO) pathway from the anterior chamber to the episcleral vein. AHO investigation can be divided into structural and functional assessments using different methods. The historical basis for studying the anterior segment of the eye and AHO in glaucoma is discussed. Structural studies of AHO are reviewed and include traditional pathological approaches to modern tools such as multi-model two-photon microscopy and optical coherence tomography. Functional assessment focuses on visualizing AHO itself through a variety of non-real-time and real-time techniques such as aqueous angiography. Implications of distal outflow resistance and segmental AHO are discussed with an emphasis on melding bench-side research to viable clinical applications. Through the development of an improved structure: function relationship for AHO in the anterior segment of the normal and diseased eye, a better understanding of the eye with improved therapeutics may be developed.
authors: Doheny Eye Institute, Los Angeles, CA, USA; Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
authors: Alex S
authors: AS
authors: Huang
authors: Doheny Eye Institute, Los Angeles, CA, USA.
authors: Chirayu
authors: C
authors: Mohindroo
authors: Hamilton Glaucoma Center and Shiley Eye Institute, University of California, San Diego, CA, USA.
authors: Robert N
authors: RN
authors: Weinreb
keywords: Aqueous angiography; Aqueous humor; Glaucoma; Intraocular pressure; Minimally invasive glaucoma surgery; OCT; Trabecular meshwork