0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
ARTICLE |

THE ACCOMMODATION AND DONDERS' CURVE AND THE NEED OF REVISING OUR IDEAS REGARDING THEM:  AN EXPERIMENTAL STUDY

ALEXANDER DUANE, M.D.
JAMA. 1909;LII(25):1992-1996. doi:10.1001/jama.1909.25420510026002f.
Text Size: A A A
Published online

NEED OF REVISING DONDERS' WORK  Of the many invaluable contributions that Donders made to our science certainly one of the most important was his determination of the range of accommodation at different ages. His researches, indeed, all admit to be fundamental. For that very reason we must avoid ascribing to them an exactitude and a validity which they do not possess and which Donders himself did not claim for them.1 For we must remember that the number of cases utilized by Donders was small and the individual variations that they presented were rather considerable. Thus his estimate that 7 D represents the normal range of accommodation at the age of 30 is based on but five cases, the accommodation of which was found to vary between 6 and 9 D. It is obvious that more numerous observations might have extended these limits in either direction and have given a

Topics

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

First Page Preview

View Large
First page PDF preview

Figures

Tables

References

CME
Also 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.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
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.

Multimedia

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

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

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

Jobs
brightcove.createExperiences();