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Laser-delivery eye-treatment method

  • US 4,846,172 A
  • Filed: 05/26/1987
  • Issued: 07/11/1989
  • Est. Priority Date: 05/26/1987
  • Status: Expired due to Term
First Claim
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1. A method for surgical treatment of the eye by laser radiation comprising the steps of:

  • (a) passing one end of a fiberoptic element through a small perforation in an outermost encapsulating tissue of the eyeball until said one end of said fiberoptic element penetrates into the eye'"'"'s anterior chamber,(b) transocularly advancing said one end of the fiberoptic element through the said anterior chamber until the penetrating end of said fiberoptic element is juxtaposed immediately adjacent targeted eye tissue to be treated,(c) coupling the opposite end of said fiberoptic element to a photoablative laser emitting radiation selected from the class consisting of (1) ultraviolet excimer radiation having a wave length of between about 193 to 351 nanometers and (2) infrared radiation having a wave length of about 2.8 to 3.0 microns and at a fluence level sufficient to produce photochemical tissue ablation and focussing the radiation being emitted from the penetrating end of the transocularly-positioned fiberoptic element upon the targeted tissue, and(d) subjecting the adjacent targeted tissue to ablative photodecomposition from the radiation while maintaining juxtaposition of the penetrating end of said fiberoptic element to effect photochemical removal of said targeted tissue.

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