0
ARTICLE |

Tonography:  Technical Difficulties and Control Studies

ROBERT W. SPENCER, M.D.; ERNEST D. HELMICK, M.D.; HAROLD G. SCHEIE, M.D.
AMA Arch Ophthalmol. 1955;54(4):515-527. doi:10.1001/archopht.1955.00930020521004.
Text Size: A A A
Published online

This paper presents, first, some of the difficulties encountered by us while instituting Grant's method1 of electrical tonography for clinical use and, second, certain control studies done on normal eyes in an attempt to determine the accuracy of the method as employed by us for routine use. The difficulties described are both the technical ones involved in actually setting up our apparatus and those of technique which led to errors in tracings after our apparatus had been assembled. We are discussing some of these pitfalls with the intent of helping others, beginning in tonography, to avoid them.

Once these difficulties had been surmounted and our method of procedure seemed sufficiently reliable, we studied a series of normal eyes, to obtain data on the reliability of tonography as used by us. Recordings were made on the same eye at different times of the same day, and on different days. Likewise,

Topics

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
/>
First page PDF preview

Figures

Tables

References

Correspondence

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Jobs
brightcove.createExperiences();