Method of manufacturing contact lenses
AssigneeInnotech Corporation
InventorsRonald D. Blum, Amitava Gupta
Life of this patent
Estimating the term…
Abstract
A method for providing a contact lens for a patient. According to this method, an optical preform is selected, and a resting position of the optical preform on the patient's eye is determined. An optical feature is also located on a patient's eye. Then, a reference position is located on the surface of the optical preform coincident with the optical feature on the patients eye, when the optical preform is in the resting position. Finally, the optical modification is provided on the optical preform at a location based on the reference position on the optical preform, either by machining the preform itself or by machining a mold that is subsequently used to form the lens.
Claims22
A method for providing a contact lens for a patient comprising:
- locating an optical feature on a patient's eye;
- selecting an optical preform;
- determining a resting position of said optical preform when said optical preform is stabilized on the patient's eye to locate a reference position on the surface of the optical preform coincident with the optical feature on the patients eye;
- providing a mold by machining;
- and
- using said mold to cast a contact lens, said contact lens having an optical modification at a location based on the reference position on the optical preform.
A contact lens having an optical modification provided by casting using a mold that is made by machining, said optical modification being located based on a position of an optical feature on the patients eye relative to the contact lens when the lens is stabilized on the patient's eye.
Dependencies are inferred from the claim text.