Approval for the menicon z(tm) (tisilfocon a) rigid gas permeable lens.  Menicon z(tm) (tisilfocon a) spherical or aspheric lenses and non-prism ballast toric lenses are indicated for extended wear (from 1 to 7 days between removals for cleaning and disinfection of the lenses, as recommended by the eyecare practitioner) for the correction of refractive error (myopia, hyperopia, presbyopia and/or astigmatism) in non-aphakic persons with non-diseased eyes.  The lens may be disinfected using a...