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Proceedings Paper

Er:YAG laser radiation in experimental ophthalmologic applications
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Paper Abstract

Er:YAG laser system generating a radiation in a free-running, long-pulse mode regime with an output energy up to 610 mJ and a wavelength in a mid-infrared region (2.94 micrometer) was used for ophthalmic micro-surgery. As a delivery system a cyclic olefin polymer-coated silver hollow glass waveguide was used. The delivery system was ended either by a focusing optics (CaF2 lens) or by a special sapphire tip, for a non-contact and contact treatment, respectively. The corneal ablation and perforation of a sclera tissue were examined for the energies from 5 mJ up to 280 mJ and from 1 to 10 pulses in the case of non-contact and contact preparation. The threshold energy for the sclera ablation was measured for the non- contact procedure to be 122 mJ (24.3 J/cm2) in the case when 1 pulse was used. For the contact preparation this threshold energy was 270 J (34.4 J/cm2) for 5 pulses used. The iris contact ablation threshold energy was measured to be 10 mJ (1.3 J/cm2) for 1 pulse. The results show the usability of the 2.94 micrometer radiation in the ophthalmic surgery.

Paper Details

Date Published: 7 June 2000
PDF: 6 pages
Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000); doi: 10.1117/12.387537
Show Author Affiliations
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Jiri Pasta, Central Military Hospital (Czech Republic)
Jan Sulc, Czech Technical Univ. (Czech Republic)
Michal Nemec, Czech Technical Univ. (Czech Republic)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 3908:
Ophthalmic Technologies X
Pascal O. Rol; Karen Margaret Joos M.D.; Fabrice Manns, Editor(s)

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