Abstract
Safe and effective laser ophthalmic surgery requires a fine balance between the efficiency of laser delivered and the degree of collateral side damage. The laser–ocular tissue interaction process is reliant on three main variables, namely, wavelength, pulse duration, and deposited energy. A certain amount of energy is needed to achieve ablation, while too much energy can result in unwanted collateral thermal damage. In our work the relationship between energy deposition and ablation effect is studied by an in-vitro experiment using an 800-nm wavelength 150 fs-pulse-duration laser system. This experiment aims to validate the probability of decreasing the supplied energy during glaucoma surgery by femtosecond laser. Our results show that less energy is needed using femtosecond laser than that using a longer pulse laser.
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References
Fiscella RD (2002) Pharmacological considerations in the treatment of glaucoma. Manag Care 11:16–20
Thompson KP, Ren QS, Parel JM (2002) Therapeutic and diagnostic application of lasers in ophthalmology. In: Waynant RW (ed) Lasers in medicine. CRC Press, Boca Raton, pp 211–245
Rizvi NH (2003) Femtosecond laser micromachining: current status and applications. RIKEN Rev 50:107–112
Konig K, Krauss O, Riemann I (2002) Intratissue surgery with 80 MHz nanojoule femtosecond laser pulses in the near infrared. Opt Express 10:171–176
Serbin J, Bauer T, Fallnich C, Kasenbacher A, Arnold WH (2002) Femtosecond lasers as a novel tool in dental surgery. Appl Surface Sci 8101:1–4
Fan CH, Sun J, Longtin JP (2002) Breakdown threshold and localized electron density in water induced by ultrashort laser pulses. J Appl Phys 91:2530–2536
Sacks ZS, Kurtz RM, Juhasz T, Mourau GA (2002) High precision subsurface photodisruption in human sclera. J Biomed Opt 7:442–450
Lasers and their use in ophthalmology. Part 3. Retrieved February 1, 2002 http://www.optometry.co.uk/articles/20010727/voke.pdf
Biophotonics applications of high-power semiconductor diode laser technology. Retrieved July 20, 2002. http://www.afrlhorizons.com/Briefs/0001/DE9903.html
Sowka J (2002) Laser therapy for glaucoma. Retrieved December 01, 2002. http://www.nova.edu/~jsowka/glauclasers.html
Acknowledgements
D. X. Hou wishes to thank Dr. L. M. He, Mr. M. F. Gong, Dr. Q. Yuan, and Dr. Y. Z. Deng for their great support in the research, and Associate Professor Donald Tan, Deputy Director of Singapore National Eye Centre and Director of Singapore Eye Research Institute for his generous input in the issue related to glaucoma treatment.
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Ngoi, B.K.A., Hou, D.X., Koh, L.H.K. et al. Femtosecond laser for glaucoma treatment: a study on ablation energy in pig iris. Lasers Med Sci 19, 218–222 (2005). https://doi.org/10.1007/s10103-004-0323-9
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DOI: https://doi.org/10.1007/s10103-004-0323-9