We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
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 ......

Parental History and Myopia: Taking the Long View

Sek Jin Chew, MD; Robert Ritch, MD
JAMA. 1994;272(16):1255. doi:10.1001/jama.1994.03520160039036.
Text Size: A A A
Published online


To the Editor.  —We applaud the longitudinal study conducted by Dr Zadnik and colleagues,1 which may provide valuable insights into the risk factors for myopia. However, we are concerned by their conclusions regarding the etiology of juvenile myopia based on cross-sectional observations in school children. They show an unwarranted bias for a genetic etiology of myopia, while ignoring the role of environmental factors. We would like to draw attention to the misleading implications of the authors' strict definition of myopia, which has partly led to their disregard of parental influence on their children's visual world during the preschool years. The latter may certainly affect ocular development.Zadnik et al concluded that "[e]ven before the onset of juvenile myopia... the premyopic eye in children with a family history of myopia already resembles the elongated eye present in myopia." The authors claim that this supports a nonenvironmental causation of myopia. Because


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview




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.


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

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

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