Contact lenses and/or methods of making the same

Details Contact lenses and/or methods of making the same Contact lenses and/or methods of making the same

G - Physics

02

C

26/197, 88/40

G02C 7/04 (2006.01)

Patent

CA 1135092

ABSTRACT OF DISCLOSURE A contact lens particularly a high minus powered anterior surface toric lens is made having a toric central optical portion without prism and an annular outer portion having prism but without toric effect, the outer portion being truncated in a lower part so that there is upward movement of the centre of rotation of the blank and of the centre of gravity in a manner such that the centre of gravity is in use below the centre of rotation, thus assisting if the lens is rotated by lid or eye movement the lens tends to rotate back into correct orientation.

334506

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