Correspondence |

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

Claudio Azzolini, MD; Pier Giorgio Gobbi, PhD; Rosario Brancato, MD
Arch Ophthalmol. 1998;116(6):830-831. doi:.
Text Size: A A A
Published online


In reply

We are grateful to Dr Berger for pinpointing an important concept, which was possibly understated in our article,1 ie, the distinction between subthreshold and above threshold interaction. Dr Berger's example is also helpful to clarify the ablation process occurring in hydrated solid tissues with Er-YAG radiation at 10 J/cm2 radiant exposure and 200-microsecond pulse length.

We would like to observe that the aim of our article was somewhat different, namely, providing the absorption parameters useful to characterize the interaction of different laser wavelengths with several fluid substitutes at unspecified energy densities and time durations. Attention was in fact devoted in our discussion to 2 main aspects: the unwanted dispersion of laser energy in the fluid before reaching the target tissue, and the shielding properties provided by the fluid for remote tissues against scattered radiation. Thus both subthreshold and above threshold conditions were involved. No mention was actually made to any tissue ablation depth, this not being the main goal of the article.


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





June 1, 1998
Jeffrey W. Berger, MD, PhD
Arch Ophthalmol. 1998;116(6):830-831. doi:.
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.
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


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.