Ophthalmic aspheric lens series

Claim 1

A STRONGLY CONVERGENT OPHTHALMIC LENS SERIES FOR USE BY APHAKIC PERSONS, AND THE LIKE, AND IN WHICH SERIES EACH OF THE LENSES THEREOF IS OF SUCH SIMILAR OPTICAL DESIGN AS TO PROVIDE IMPROVED VISUAL ACUITY AT RELATIVELY WIDE FIELDS OF VIEW INCLUDING VIEWING ANGLES OF AT LEAST 30* RELATIVE TO THE OPTICAL AXIS OF EACH RESPECTIVE LENS AND FOR ALL FITTING DISTANCES OF BETWEEN APPROXIMATELY 23.25 MM. AND 27 MM. FROM THE OCULAR VERTEX THEREOF, AND WHEREIN BLURRING OF IMAGES, PARTICULARLY THROUGH MARGINAL PORTIONS OF THE LENSES, IS MATERIALLY REDUCED BY REDUCING THE TANGENTIAL POWER ERRORS OF SAID LENSES AT SAID 30* LOCATIONS SUBSTANTIALLY TO A MINIMUM, AND PREFERABLY SLIGHTLY POSITIVE IN VALUE, WHILE THE SAGITTAL POWER ERRORS AT THE SAME LOCATIONS ARE MAINTAINED NEGATIVE AND ALLOWED TO INCREASE IN NUMERICAL VALUES AS LONG AS THEY DO NOT EXCEED ACCEPTABLE LIMITS, SAID LENS SERIES COMPRISING A PLURALITY OF STRONGLY CONVERGENT LENSES OF SUCH CONTROLLED OPTICAL DESIGN AS TO PROVIDE A UNIFORMLY GRADUATED GROUP OF ASPHERIC LENSES FOR SUPPLYING SPHERICAL PRESCRIPTIONS IN A RANGE OF DIOPTRIC POWERS FROM +7.00D TO +16.00D, AS WELL AS TO PROVIDE A UNIFORMLY GRADGROUP OF TORIC LENSES COMPRISING THE SPHERICAL PRESCRIPTIONS OF SAID +7.00D TO +16.00D RANGE COMBINED WITH CYLINDRICAL PRESCRIPTIONS IN A RANGE OF DIOPTRIC POWERS FROM NEAR ZERO TO -4.00D, AND WITH THE PRESCRIPTIONS OF EACH RANGE BEING DIVIDED INTO EQUAL STEPS OF DIOPTERS AND EQUAL FRACTIONS THEREOF, ALL OF THE LENSES OF SAID SERIES HAVING ASPHERICALLY CURVED SURFACES ON THE FRONT SIDES THEREOF, AND SAID ASPHERICALLY CURVED FRONT SURFACES COM PRISING CURVATURES OF DIFFERENT VERTEX POWERS, SAID ASPHERIC FRONT SURFACES OF DIFFERENT VERTEX POWERS BEING COMPUTED IN ACCORDANCE WITH A PREDETERMINED SINGLE COM MON SELECTED NEGATIVE SPHERICAL BASE CURVE VALUE FOR THE OCULAR SIDES OF THE LENSES OF SAID SERIES, IN ACCORDANCE WITH THE DIFFERENT PREDETERMINED AXIAL THICKNESSES REQUIRED