System and method for communicating the geometry of a contact lens
AssigneeCRT Technology, Inc.
InventorsJerome A. Legerton, William Meyers
Life of this patent
Estimating the term…
Abstract
In exemplary embodiments, this invention comprises a method for communicating the geometry of a contact lens to a manufacturer. The method includes describing the shape of a first zone of a contact lens and describing the shape of a second zone of the contact lens by providing an angle of orientation from a reference point located on the first zone. The method may further include describing the shape of one or more additional zones by providing angles of orientation from a reference point on another zone.
Claims15
A method for communicating the shape of a contact lens to a manufacturer, the contact lens having a first zone and a second zone, the method comprising:
- describing the shape of the first zone of the contact lens by providing a geometric parameter;
- and
- describing the shape of the second zone of the contact lens by providing a first angle of orientation wherein the first angle of orientation is defined as an angle between a first line and a second line wherein the first line includes both a reference point on the first zone and a point tangent to the surface of the second zone and the second line is vertical or horizontal through the reference point on the first zone.
A method for communicating the shape of a contact lens, the contact lens having a first zone and a second zone, the method comprising:
- describing the shape of the first zone of the contact lens by providing a geometric parameter;
- describing the shape of a first semi-meridian of the second zone of the contact lens by providing a first angle of orientation wherein the first angle of orientation is defined as an angle between a first line and a second line wherein the first line includes both a first reference point on the first zone and a first point tangent to the surface of the second zone and the second line is vertical or horizontal through the first reference point on the first zone;
- describing the shape of a second semi-meridian of the second zone of the contact lens by providing a second angle of orientation wherein the second angle of orientation is defined as an angle between a third line and a fourth line wherein the third line includes both a second reference point on the first zone and a second point tangent to the surface of the second zone and the fourth line is vertical or horizontal through the second reference point on the first zone,
- wherein the shapes of the first and second semi-meridians differ;
- and
- describing a rotational transition between the first and second semi-meridians.
A method for manufacturing a contact lens comprising:
- receiving at least one geometric parameter relating to a first zone of a contact lens;
- receiving an angle of orientation of a second zone of the contact lens wherein the angle of orientation is defined as an angle between a first line and a second line wherein the first line includes both a reference point on the first zone and a point tangent to the surface of the second zone and the second line is vertical or horizontal through the reference point on the first zone;
- using a mathematical equation in connection with the angle of orientation and the reference point to determine a geometry of the contact lens;
- and
- forming the contact lens according to the geometry.
Dependencies are inferred from the claim text.