Er:YAG laser radiation in experimental ophthalmologic applications

Helena Jelinkova; Jiri Pasta; Jan Sulc; Michal Nemec; Mitsunobu Miyagi; Yi-Wei Shi; Yuji Matsuura

doi:10.1117/12.387537

7 June 2000 Er:YAG laser radiation in experimental ophthalmologic applications

Helena Jelinkova, Jiri Pasta, Jan Sulc, Michal Nemec, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 3908, Ophthalmic Technologies X; (2000) https://doi.org/10.1117/12.387537
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

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.

Citation Download Citation

Helena Jelinkova, Jiri Pasta, Jan Sulc, Michal Nemec, Mitsunobu Miyagi, Yi-Wei Shi, and Yuji Matsuura "Er:YAG laser radiation in experimental ophthalmologic applications", Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000); https://doi.org/10.1117/12.387537

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