Method and apparatus for enhanced corneal accommodation

Details Method and apparatus for enhanced corneal accommodation Method and apparatus for enhanced corneal accommodation

A - Human Necessities

61

B

A61B 18/18 (2006.01) A61B 19/00 (2006.01) A61M 31/00 (2006.01)

Patent

CA 2539395

A method and apparatus related to enhancing corneal accommodation to address the effect of presbyopia. Corneal/scleral topology measurements in accommodation and non-accommodating states are indicative of a presbyopic subject~s nominal corneal accommodative power. A desired accommodative power intended to improve on the effect of presbyopia can be determined, suggesting a selective biomechanical intervention in the corneal structure outside of the optical zone to create flexure regions. These flexure regions would allow enhanced corneal accommodation upon presentation of an accommodating stimulus. Intervention could be in the form of, for example, corneal surface ablation, intrastromal ablation, conductive kerastoplasty (CK), laser thermal kerastoplasty (LTK), and corneal and/or scleral implants. An improved topology measuring apparatus having an improved field of view and other attributes is disclosed.

L'invention concerne un procédé et un dispositif pour l'amélioration de l'accommodation cornéenne, visant à régler le problème de la presbytie. Des mesures de topologie cornéenne/sclérale en accommodation et hors accommodation indiquent la faculté d'accommodation cornéenne nominale. On peut ainsi déterminer une faculté d'accommodation souhaitée pour améliorer l'état de presbytie, ce qui permet d'envisager une intervention biomécanique sélective dans la structure cornéenne, en dehors de la zone optique, pour l'établissement de régions infléchies, lesquelles tendent à améliorer l'accommodation cornéenne sur présentation d'un stimulus d'accommodation. On peut procéder par exemple à une ablation de surface cornéenne, à une ablation intrastromale, à une kératoplastie conductrice, à une kératoplastie thermique laser et à la pose d'implants en milieu cornéen et/ou scléral. L'invention concerne également un dispositif de mesure de topologie amélioré à champ de vision amélioré qui présente aussi d'autres attributs.

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