Zero compression microkeratome cutting head assembly

A - Human Necessities – 61 – F

Patent

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Details

A61F 9/013 (2006.01) A61F 9/007 (2006.01)

Patent

CA 2431794

A microkeratome cutting head assembly (10). A cutting blade (14) of the assembly (10) has a nominal length and presents forward cutting edge (22). An applanation member (12) for applanating a cornea of an eye includes a trailing portion (18) having a curved section presenting an apex (20). The forward cutting edge (22) of the cutting blade (14) of the nominal length is positioned relative to the apex (20) so that together the forward cutting edge (22) and the apex (20) define a desired thickness of a flap to be created from the cornea such that the flap is essentially not compressed.

L'invention concerne un ensemble (10) tête de coupe pour microkératomes. Cet ensemble (10) comprend une lame (14) de coupe présentant une longueur nominale et présentant un bord (22) de coupe dirigé vers l'avant, un élément (12) d'aplanissement permettant d'aplanir la cornée de l'oeil, qui comprend une partie (18) arrière présentant une section incurvée formant un sommet (20). La position relative du bord (22) de coupe avant de la lame (14) de longueur nominale par rapport au sommet (20) est telle que le bord (22) de coupe dirigé vers l'avant et le sommet (20) définissent conjointement l'épaisseur désirée du lambeau (50), et permettent de séparer ce lambeau de la cornée (48) sensiblement sans comprimer ce dernier.

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