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 ......
Correspondence |

Erbium-YAG Laser Ablation: The Myth of 1-µm Penetration

Jeffrey W. Berger, MD, PhD
Arch Ophthalmol. 1998;116(6):830-831. doi:.
Text Size: A A A
Published online


The erbium (Er)-YAG laser is a promising laser source for highly precise tissue removal in anterior segment, adnexal, and vitreoretinal surgical applications. In the July 1997 ARCHIVES, Azzolini et al1 characterize the midinfrared transmission properties of vitreous and vitreous substitutes including balanced salt-type solutions, silicone oils, and perfluorocarbon liquid. The authors cite the often quoted "literature" value of 1 µm for the penetration depth of Er-YAG laser 2.94-µm radiation through aqueous solutions, and note that ". . . a strongly absorbing medium permits only contact procedures, or at most, a working distance of the fiber tip from the tissue that is much shorter than the penetration depth of the medium itself."1(p901)

Figures in this Article


Sign in

Purchase Options

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

First Page Preview

View Large
First page PDF preview


Place holder to copy figure label and caption

Calculated ablation depth for erbium-YAG laser radiation for a radiant exposure of 10 J/cm2incident on tissue with an absorption coefficient of 8000/cm. Data are presented for the logarithmic dependence predicted by Beer's law (lower curve) and the linear dependence in agreement with experimental observations as calculated by a numerical model.3

Graphic Jump Location




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.