
Proceedings Paper
Measurement of the temperature increase in the porcine cadaver iris during direct illumination by femtosecond laser pulsesFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
Multiple femtosecond lasers have now been cleared for use for ophthalmic surgery, including for creation of corneal
flaps in LASIK surgery. Preliminary measurements indicated that during typical surgical use, 50-60% of laser energy
may pass beyond the cornea with potential effects on the iris. To further evaluate iris laser exposure during femtosecond
corneal surgery, we measured the temperature increase in porcine cadaver iris in situ during direct illumination by the
iFS Advanced Femtoosecond Laser (AMO Inc. Santa Ana, CA) with an infrared thermal imaging camera. To replicate
the illumination geometry of the eye during the surgery, an excised porcine cadaver iris was placed 1.5 mm from the flat
glass contact lens. The temperature field was observed in twenty cadaver iris at laser pulse energy levels ranging from 1
to 2 μJ (corresponding approximately to surgical energies of 2 to 4 μJ per pulse). Temperature increases up to 2.3 °C
(corresponding to 2 μJ per pulse and 24 second procedure time) were observed in the cadaver iris with little variation in
temperature profiles between specimens for the same laser energy illumination. For laser pulse energy and procedure
time characteristic to the iFS Advanced Femtoosecond Laser the temperature increase was measured to be 1.2 °C. Our
studies suggest that the magnitude of iris heating that occurs during such femtosecond laser corneal surgery is small and
does not present a safety hazard to the iris.
Paper Details
Date Published: 23 February 2010
PDF: 7 pages
Proc. SPIE 7562, Optical Interactions with Tissues and Cells XXI, 756216 (23 February 2010); doi: 10.1117/12.841334
Published in SPIE Proceedings Vol. 7562:
Optical Interactions with Tissues and Cells XXI
E. Duco Jansen; Robert J. Thomas, Editor(s)
PDF: 7 pages
Proc. SPIE 7562, Optical Interactions with Tissues and Cells XXI, 756216 (23 February 2010); doi: 10.1117/12.841334
Show Author Affiliations
Hui Sun, Univ. of California, Irvine (United States)
Ronald M. Kurtz, Univ. of California, Irvine (United States)
Ronald M. Kurtz, Univ. of California, Irvine (United States)
Tibor Juhasz, Univ. of California, Irvine (United States)
Published in SPIE Proceedings Vol. 7562:
Optical Interactions with Tissues and Cells XXI
E. Duco Jansen; Robert J. Thomas, Editor(s)
© SPIE. Terms of Use
