NDLI: Theoretical model and design of a device to reduce the influence of environmental factors on refractive surgery outcomes

Content Provider	IEEE Xplore Digital Library
Author	Schena, E. Silvestri, S. Franzesi, G.T. Cupo, G. Carito, P. Ghinelli, E.
Copyright Year	2006
Description	Author affiliation: Fac. of Biomed. Eng., Univ. Campus Bio-Medico of Rome (Schena, E.; Silvestri, S.)
Abstract	Recently many different groups show that environmental temperature and relative humidity affects the outcomes of refractive surgery performed by excimer lasers in an unpredictable fashion. A theoretical model of the water vapor absorption at 193 nm wavelength is presented and discussed in order to quantitatively assess the influence of environmental parameters on the laser energy that actually reaches the corneal surface. Model simulations show that laser energy absorption (up to 7% of the available energy) occurs along the path of laser beam, into the existent space between the laser beam source and the patient's eye, and is caused by environmental temperature and relative humidity (respectively 35degC and 95%). Our findings suggest that this energy loss reduces the ablation rate, producing a significant under-correction of the treated corneas. A cost effective device which keeps thermo hygrometric parameters constant along the laser beam path, is also provided
Sponsorship	IEEE EMB
Starting Page	343
Ending Page	346
File Size	284060
Page Count	4
File Format	PDF
ISBN	1424400325
ISSN	1557170X
DOI	10.1109/IEMBS.2006.260184
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Environmental factors Laser modes Laser theory Laser ablation Laser beams Optical refraction Laser surgery Temperature Humidity Absorption
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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