Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2011 Jan;59 Suppl(Suppl1):S69-75.
doi: 10.4103/0301-4738.73699.

Angle imaging: advances and challenges

Desmond T L Quek  1 , Monisha E Nongpiur, Shamira A Perera, Tin Aung
Affiliations
Review

Angle imaging: advances and challenges

Desmond T L Quek et al. Indian J Ophthalmol. 2011 Jan.

Abstract

Primary angle closure glaucoma (PACG) is a major form of glaucoma in large populous countries in East and South Asia. The high visual morbidity from PACG is related to the destructive nature of the asymptomatic form of the disease. Early detection of anatomically narrow angles is important and the subsequent prevention of visual loss from PACG depends on an accurate assessment of the anterior chamber angle (ACA). This review paper discusses the advantages and limitations of newer ACA imaging technologies, namely ultrasound biomicroscopy, Scheimpflug photography, anterior segment optical coherence tomography and EyeCam, highlighting the current clinical evidence comparing these devices with each other and with clinical dynamic indentation gonioscopy, the current reference standard.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Angle parameters on ultrasound biomicroscopy, showing the trabeculo–iris space area at 500 µm (TISA500), angle recess area at 500 µm (ARA500) and angle opening distance
Figure 2
Figure 2
Ultrasound biomicroscopy procedure
Figure 3
Figure 3
Visante anterior segment optical coherence tomography procedure
Figure 4
Figure 4
Visante anterior segment optical coherence tomography image showing closed angles
Figure 5
Figure 5
High-resolution spectral domain optical coherence tomography image showing angle structures: trabecular meshwork, Schwalbe’s line and scleral spur
Figure 6
Figure 6
EyeCam procedure
Figure 7
Figure 7
Image of an open angle obtained using EyeCam, detailing, clearly, the Schwalbe’s line, pigmented trabecular meshwork, scleral spur and iris processes
See this image and copyright information in PMC

References

    1. Quigley HA, Broman AT. The number of people with glaucoma worldwide in 2010 and 2020. Br J Ophthalmol. 2006;90:262–7. - PMC - PubMed
    1. Erie JC, Hodge DO, Gray DT. The incidence of primary angle-closure glaucoma in Olmsted County, Minnesota. Arch Ophthalmol. 1997;115:177–81. - PubMed
    1. Foster PJ, Baasanhu J, Alsbirk PH, Munkhbayar D, Uranchimeg D, Johnson GJ. Glaucoma in Mongolia. A population-based survey in Hovsgol province, northern Mongolia. Arch Ophthalmol. 1996;114:1235–41. - PubMed
    1. Foster PJ, Oen FT, Machin D, Ng TP, Devereux JG, Johnson GJ, et al. The prevalence of glaucoma in Chinese residents of Singapore: a cross-sectional population survey of the Tanjong Pagar district. Arch Ophthalmol. 2000;118:1105–11. - PubMed
    1. Dandona L, Dandona R, Mandal P, Srinivas M, John RK, McCarty CA, et al. Angle-closure glaucoma in an urban population in southern India. The Andhra Pradesh eye disease study. Ophthalmology. 2000;107:1710–6. - PubMed

MeSH terms