Toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses and method of manufacturing

A finished spherical or aspheric bifocal, multifocal or progressive addition contact lens, said finished lens being made according to a method comprising the steps of:

• fitting a patient requiring a near correction with an optic comprising a single vision contact lens for optimal distance vision and comfortable fit;
• over-refracting the patient to determine the required near correction to be embodied in the contact lens;
• marking a portion of the optic corresponding to the center location of the pupil on the convex side of the optic to form an optical preform;
• removing the optical preform from the eye of the patient;
• marking the concave side of the optical preform at a position corresponding to the mark on the convex side denoting the center of the pupil;
• removing the mark disposed on the convex side of the optical preform;
• placing a specified volume of polymerizable resin in a mold embodying the required correction that includes an add power zone so that he resin fills intervening space between the mold and the optical preform;
• aligning the add power zone on the optical preform to a predetermined position with respect to the mark on the optical preform designating the center of the pupil;
• polymerizing the resin;
• and
• demolding the optical preform to obtain the finished contact lens having the required correction.

A method for making a finished spherical or aspheric bifocal, multifocal or progressive addition contact lens, comprising the steps of:

• fitting a patient requiring a near correction with an optic comprising a single vision contact lens for optimal distance vision and comfortable fit;
• marking a portion of the optic corresponding to the center location of the pupil on the convex side of the optic to form an optical preform;
• removing the optical preform from the eye of the patient;
• marking the concave side of the optical preform at a position corresponding to the mark on the convex side denoting the center of the pupil;
• removing the mark disposed on the convex side of the optical preform;
• placing a specified volume of polymerizable resin in a mold embodying the required correction that includes an add power zone so that the resin fills intervening space between the mold and the optical preform;
• aligning the add power zone on the optical preform to a predetermined position with respect to the mark on the optical preform designating the center of the pupil;
• polymerizing the resin;
• and
• demolding the optical preform to obtain the finished contact lens having the required correction.

A finished spherical or aspheric bifocal, multifocal or progressive addition contact lens, said finished lens being made according to a method comprising the steps of:

• fitting a patient requiring a near correction with an optic comprising a single vision spherical contact lens for optimal distance vision and comfortable fit;
• marking a portion of the optic corresponding to the center location of the pupil on the convex side of the optic to form an optical preform;
• removing the optical preform from the eye of the patient;
• marking the concave side of the optical preform at a position corresponding to the mark on the convex side denoting the center of the pupil;
• removing the mark disposed on the convex side of the optical preform;
• placing a specified volume of polymerizable resin in a mold embodying the required correction that includes an add power zone so that the resin fills intervening space between the mold and the optical preform;
• aligning the add power zone on the optical preform to a predetermined position with respect to the mark on the optical preform designating the center of the pupil;
• polymerizing the resin;
• and
• demolding the optical preform to obtain the finished contact lens having the required correction.

A method for making a finished toric single vision lens comprising the steps of:

• fitting a patient requiring a near correction with an optic comprising a single vision contact lens for optimal distance vision and comfortable fit;
• over-refracting the patient to determine the required toric correction to be embodied in the contact lens;
• marking a portion of the optic corresponding to the center location of the pupil on the convex side of the optic to form an optical preform;
• removing the optical preform from the eye of the patient;
• marking the concave side of the optical preform at a position corresponding to the mark on the convex side denoting the center of the pupil;
• removing the mark disposed on the convex side of the optical preform;
• placing a specified volume of polymerizable resin in a mold embodying the required correction that includes a toric zone so that the resin fills intervening space between the mold and the optical preform;
• aligning the toric zone on the optical preform to a predetermined position with respect to the mark on the optical preform designating the center of the pupil;
• polymerizing the resin;
• and
• demolding the optical preform to obtain the finished contact lens having the required correction.

A finished toric single vision contact lens made according to a method comprising the steps of:

• fitting a patient requiring a near correction with an optic comprising a single vision spherical contact lens for optimal distance vision and comfortable fit;
• over-refracting the patient to determine the required toric correction to be embodied in the contact lens;
• marking a portion of the optic corresponding to the center location of the pupil on the convex side of the optic to form an optical preform;
• removing the optical preform from the eye of the patient;
• marking the concave side of the optical preform at a position corresponding to the mark on the convex side denoting the center of the pupil;
• removing the mark disposed on the convex side of the optical preform;
• placing a specified volume of polymerizable resin in a mold embodying the required correction that includes a toric zone so that the resin fills intervening space between the mold and the optical preform;
• aligning the toric zone on the optical preform to a predetermined position with respect to the mark on the optical preform designating the center of the pupil;
• polymerizing the resin;
• and
• demolding the optical preform to obtain the finished contact lens having the required correction.