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Principles of Photometry of the Papilla

Principles of Photometry of the Papilla Abstract • To enhance the qualitative information gained by photographing the optic nerve head, we built a silicon photovoltaic detector (photodiode) in the image plane of a fundus camera (Zeiss). It permitted quantitative evaluation of the relative brightness of the illuminated papilla. Following construction of the device and during the early course of more than 260 measurement sessions (on more than 130 subjects), several heretofore unknown sources of error were encountered and subsequently dealt with, resulting in a margin of error for the entire system of between 0.3% and 1.2%. Pallor of the optic nerve head induced by artificial ocular hypertension can be well reproduced by this method. References 1. Robert Y, Niesel P, Ehrengruber H: Measurement of the optic nerve head: I. The pallor of the papilla in artificial ocular hypertension . Graefes Arch Clin Exp Ophthalmol 1982;219:176-182.Crossref 2. Robert Y, Niesel P, Ehrengruber H: Measurement of the optic nerve head: II. Short-term fluctuations of the optical density of the nerve head . Graefes Arch Clin Exp Ophthalmol 1982; 219:183-187.Crossref 3. Schwartz B, Kern J: Scanning microdensitometry of optic disc pallor in glaucoma . Arch Ophthalmol 1977;95:2159-2165.Crossref 4. Gloster J: Fundus reflectometry in the study of choroidal circulation . Int Ophthalmol 1983;6:109-118.Crossref 5. Hendrickson P, Robert Y: Direkte Messung der Papillenhelligkeit . Klin Monatsbl Augenheilkd 1984;184:357-358.Crossref 6. Rosenthal A, Falconer D, Barrett P: Digital measurement of pallor-disc ratio . Arch Ophthalmol 1980;98:2027-2031.Crossref 7. Betz P, Camps F, Collignon-Brach J, et al: Biometric study of the disc cup in open-angle glaucoma . Graefes Arch Clin Exp Ophthalmol 1982;218:70-74.Crossref http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Ophthalmology American Medical Association

Principles of Photometry of the Papilla

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Publisher
American Medical Association
Copyright
Copyright © 1984 American Medical Association. All Rights Reserved.
ISSN
0003-9950
eISSN
1538-3687
DOI
10.1001/archopht.1984.01040031388033
Publisher site
See Article on Publisher Site

Abstract

Abstract • To enhance the qualitative information gained by photographing the optic nerve head, we built a silicon photovoltaic detector (photodiode) in the image plane of a fundus camera (Zeiss). It permitted quantitative evaluation of the relative brightness of the illuminated papilla. Following construction of the device and during the early course of more than 260 measurement sessions (on more than 130 subjects), several heretofore unknown sources of error were encountered and subsequently dealt with, resulting in a margin of error for the entire system of between 0.3% and 1.2%. Pallor of the optic nerve head induced by artificial ocular hypertension can be well reproduced by this method. References 1. Robert Y, Niesel P, Ehrengruber H: Measurement of the optic nerve head: I. The pallor of the papilla in artificial ocular hypertension . Graefes Arch Clin Exp Ophthalmol 1982;219:176-182.Crossref 2. Robert Y, Niesel P, Ehrengruber H: Measurement of the optic nerve head: II. Short-term fluctuations of the optical density of the nerve head . Graefes Arch Clin Exp Ophthalmol 1982; 219:183-187.Crossref 3. Schwartz B, Kern J: Scanning microdensitometry of optic disc pallor in glaucoma . Arch Ophthalmol 1977;95:2159-2165.Crossref 4. Gloster J: Fundus reflectometry in the study of choroidal circulation . Int Ophthalmol 1983;6:109-118.Crossref 5. Hendrickson P, Robert Y: Direkte Messung der Papillenhelligkeit . Klin Monatsbl Augenheilkd 1984;184:357-358.Crossref 6. Rosenthal A, Falconer D, Barrett P: Digital measurement of pallor-disc ratio . Arch Ophthalmol 1980;98:2027-2031.Crossref 7. Betz P, Camps F, Collignon-Brach J, et al: Biometric study of the disc cup in open-angle glaucoma . Graefes Arch Clin Exp Ophthalmol 1982;218:70-74.Crossref

Journal

Archives of OphthalmologyAmerican Medical Association

Published: Nov 1, 1984

References