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E. J. Berjano, J. M. Ferrero, and J. L. Ali, “Effects of anisotropy in cornea thermal conductivity on temperature profiles in RF thermo keratoplasty”, Proceedings of the 20th Ann. Int’l Conf. of IEEE Eng. in Medicine and Biology, Vol. 20 (4), No. 4, (1998), pp 1953-1955.

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Article

Thermal Topographical Rings as a New Tool for Laser Eye Surgery

1Mechanical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

2Biomedical Engineering Department, Al Khwarizmi College of Eng., University of Baghdad, Baghdad, Iraq


Journal of Biomedical Engineering and Technology. 2017, Vol. 5 No. 1, 1-5
DOI: 10.12691/jbet-5-1-1
Copyright © 2017 Science and Education Publishing

Cite this paper:
Khalid A. Joudi, Somer M. Nacy, Nebras H. Ghaeb. Thermal Topographical Rings as a New Tool for Laser Eye Surgery. Journal of Biomedical Engineering and Technology. 2017; 5(1):1-5. doi: 10.12691/jbet-5-1-1.

Correspondence to: Somer  M. Nacy, Biomedical Engineering Department, Al Khwarizmi College of Eng., University of Baghdad, Baghdad, Iraq. Email: nacys2@asme.org

Abstract

Measurement of the corneal surface temperature during the laser surgery have been modified at the last few years, to be used as an extra useful monitoring tool during the dynamic ablation process. While the concentric Placido rings have been used before to measure the refractive errors, here, it have been modified to be used as a new suggested tool to study the thermal response upon the anterior corneal surface during laser eye surgeries. The thermal infrared camera was used to get an image captured at the end of the treatment, where contours with isotherms are derived and examined. The new contour lines introduce the temperature induced per location upon the corneal surface and reflect the biomechanical response behavior. Comparing the contour image with the image generated by the treatment system for the ablated depth showed a new indication for safety limits especially the effect of decentration and other irregular aberrations.

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