Ophthalmologica
Original Paper
Optimum Technique of Light Brightness Assessment in Control Subjects and Patients with Ocular Hypertension and GlaucomaBorgmann C.a · Steiner H.a · Dutton G.N.baFreie Universität Berlin, FRG; bTennent Institute of Ophthalmology, Western Infirmary, Glasgow, UK
|
|
Log in to MyKarger to check if you already have access to this content.
KAB
Buy a Karger Article Bundle (KAB) and profit from a discount!
If you would like to redeem your KAB credit, please log in.
Save over 20% compared to the individual article price.
Article / Publication Details
Received: April 02, 1991
Accepted: May 29, 1991
Published online: March 31, 2010
Issue release date: 1991
Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0
ISSN: 0030-3755 (Print)
eISSN: 1423-0267 (Online)
For additional information: https://www.karger.com/OPH
Abstract
The light brightness test is an investigation in which crossed polarizing lenses placed in front of each eye are rotated with respect to one another to ellicit any disparity in perception of a diffusely illuminated screen. A number of different strategies can be employed to achieve the aim of determining the degree of disparity which is perceived as equal by the patient. A cohort of 45 control subjects was assessed in order to determine the ranges of brightness disparity accepted as equal for six methods of assessment. The method which gave the optimal confidence limit was to preset one pair of lenses at 0° (maximum transmission) and the other as a fixed reference at 45 °. Rotation of the lens set at 0 ° was carried out until the brightness of an X-ray box is perceived as equal. The strategy was then reversed. A disparity in one or both recordings greater than 76.5% is outside 99% confidence limits for the whole population studied. One of 14 patients with ocular hypertension gave a consistently ‘positive’ result. For the optimal method, over 60% of patients with glaucoma fell outside 95% condidence limits for normal controls indicating that a disparity in brightness perception between eyes is a common feature in glaucoma, in which the disease process usually affects one eye more than the other. For the patients with chronic glaucoma there was a positive correlation between the difference in brightness perception and the difference in central visual field score, indicating that brightness perception may be subserved by the central 30° of the retina. When combined with visual acuity assessment this easily performed test warrants evaluation as a potential screening test for chronic glaucoma.
© 1991 S. Karger AG, Basel
Related Articles:
Article / Publication Details
Received: April 02, 1991
Accepted: May 29, 1991
Published online: March 31, 2010
Issue release date: 1991
Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0
ISSN: 0030-3755 (Print)
eISSN: 1423-0267 (Online)
For additional information: https://www.karger.com/OPH
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
Get Permission
PubMed ID
