Register for email alerts and news feeds:
This journal | BMJ Group
rss
British Journal of Ophthalmology 2001;85:1347-1351; doi:10.1136/bjo.85.11.1347
Copyright © 2001 by the BMJ Publishing Group Ltd.
Br J Ophthalmol 2001;85:1347-1351 ( November )

A comparison of stereoscopic and monoscopic evaluation of optic disc topography using a digital optic disc stereo camera

Ben Parkina, Garry Shuttleworthb, Mark Costenc, Charles Davisonc

a Southampton Eye Unit, Southampton General Hospital, Tremona Road, Southampton SO16 6YD, UK, b Bristol Eye Hospital, Lower Maudlin Street, Bristol BS1 2LX, UK, c Bournemouth Eye Unit, Royal Bournemouth Hospital, Castle Lane East, Bournemouth BH7 7DW, UK

Correspondence to: Mr Ben Parkin benparkin{at}hotmail.com

Accepted for publication 25 April 2001

AIMS---To compare stereophotographic and monophotographic optic disc assessments made using a digital optic disc stereo camera.
METHODS---Stereo digital optic disc photographs of 150 selected patients who had presented to a glaucoma clinic were assessed by two masked observers on separate occasions using (1) the stereophotographs and a stereoviewer, (2) a single image from the same stereopair. Results were analysed for both right and left eyes separately. 95% tolerance limits for change (TC) and intraclass correlation coefficients (ICC) were calculated and a multivariate analysis using a general linear model for repeated measures was performed.
RESULTS---A total of 201 optic disc images of 150 patients (84 females, 108 left eyes) were analysed. Mean age of patients was 64 years. The results for right eyes are as follows (similar results were obtained for left eyes). Intraobserver (stereoscopic compared to monoscopic) measurements of: horizontal cup:disc ratios (CDR), ICC = 0.5995 and 0.7269, TC = 34% and 27%; vertical CDR, ICC = 0.8298 and 0.817, TC = 25% and 27%; area CDR, ICC = 0.7757 and 0.8259, TC = 28% and 25%; circumference CDR, ICC = 0.7618 and 0.8103, TC = 28% and 25%. Interobserver measurements of: horizontal CDR, ICC stereoscopic (SS) = 0.7287; monoscopic (MS) = 0.5030; TC SS = 30%; MS = 32%; vertical CDR, ICC SS = 0.8439; MS = 0.7106; TC SS = 25%; MS = 31%; area CDR, ICC SS = 0.8392; MS = 0.6276; TC SS = 26%; MS = 32%; circumference CDR, ICC SS = 0.8433; MS = 0.6438, TC SS = 26%; MS = 31%. Systematic bias between observers and between methods was within acceptable limits.
CONCLUSIONS---This study using a digital stereo camera indicates that there may be little benefit of stereoscopic imaging over monoscopic imaging despite demonstrating small but inconsistent differences between both observers and methods.

© 2001 by British Journal of Ophthalmology
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?

This article has been cited by other articles:

  • Chauhan, B. C., Hutchison, D. M., Artes, P. H., Caprioli, J., Jonas, J. B., LeBlanc, R. P., Nicolela, M. T. (2009). Optic Disc Progression in Glaucoma: Comparison of Confocal Scanning Laser Tomography to Optic Disc Photographs in a Prospective Study. IOVS 50: 1682-1691 [Abstract] [Full Text]  
  • Abramoff, M. D., Alward, W. L. M., Greenlee, E. C., Shuba, L., Kim, C. Y., Fingert, J. H., Kwon, Y. H. (2007). Automated Segmentation of the Optic Disc from Stereo Color Photographs Using Physiologically Plausible Features. IOVS 48: 1665-1673 [Abstract] [Full Text]  
  • Morgan, J E, Sheen, N J L, North, R V, Choong, Y, Ansari, E (2005). Digital imaging of the optic nerve head: monoscopic and stereoscopic analysis. Br. J. Ophthalmol. 89: 879-884 [Abstract] [Full Text]  

This Article

Services
Citing Articles
Google Scholar
PubMed
Topic Collections
Bookmark with

Register for free content

The full back archive is now available for all BMJ Journals. Institutional subscribers may access the entire archive as part of their subscription. Personal subscribers will also have access to all content when logged in. Non-subscribers who register have free access to all articles published before 2006 right back to volume 1 issue 1. Register here to access the free archive of all BMJ Journals.

Don't forget to sign up for content alerts so you keep up to date with all the articles as they are published.

Ophthalmology Jobs

Ophthalmology Jobs

Show me all >>