摘要:
A wrist implant requires minimal resection of the distal radius and preserves the sigmoid notch and articulation with the head of the distal ulna. The wrist implant generally includes a radius portion, a carpal portion and a carpal ball. The wrist implant includes a primary articulation and a secondary rotational articulation. The primary articulation occurs between the radius portion and the carpal ball. The secondary articulation occurs between the carpal ball and the carpal portion.
摘要:
The invention provides methods for designing contact lenses that takes into account pupil size and vergence. The lenses of the invention augment the eye's accommodative gain and take advantage of the eye's residual accommodation amplitude.
摘要:
A method for designing ophthalmic lenses, including progressive addition lenses, and lenses produced by the method are provided. The method permits the direct correlation of an individual's subjective assessment of the lens' performance and the objective measure of lens performance relative to the individual. The method permits generation of lens designs based on the head and eye movement of the individual and the designing of customized lenses.
摘要:
The present invention provides a method for the manufacture of thin multifocal lenses by deposition of a high refractive index material on a lens substrate.
摘要:
A wrist implant requires minimal resection of the distal radius and preserves the sigmoid notch and articulation with the head of the distal ulna. The wrist implant generally includes a radius portion, a carpal portion and a carpal ball. The wrist implant includes a primary articulation and a secondary rotational articulation. The primary articulation occurs between the radius portion and the carpal ball. The secondary articulation occurs between the carpal ball and the carpal portion.
摘要:
An apparatus for the automated production of ophthalmic lenses, particularly compound lenses having a plastic coating on a plastic lens is described. A mold, after rotational orientation, is placed in a gimbal assembly to provide for the proper tilt. This gimbal assembly forms part of a fixture attached to an indexing means which moves for complete assembly of a molding fixture and then moves the molding fixture through a chamber to cure the resin. A preform, after rotational orientation, is held, by a preform gripper placed above the mold, and with sufficient clearance between the mold and the preform to allow the correct resin thickness during the curing portion of the process. The fixture is also provided with members to firmly grip the preform gripper so as to maintain its orientation throughout the curing process.
摘要:
The invention provides progressive addition lenses designed for uses in which a large region of intermediate refractive power is desirable. The enlarged intermediate region is provided without partial or complete elimination of the distance vision zone.
摘要:
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to conventional progressive addition lenses. This result is achieved by combining a progressive addition surface with a first dioptric add power with at least one optical element that provides additional dioptric add power to the lens.
摘要:
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 machined on the optical preform at a location based on the reference position on the optical preform.
摘要:
A method for making improved optical quality lenses is described which includes arranging a mold having a molding surface, a curable optical quality resin composition, and a plastic lens preform of optical quality material such that the resin composition is disposed between, and in contact with, the plastic lens preform and the mold; upon curing, the resin composition forms a cured plastic attached portion that is bonded to the plastic lens preform. The resin composition and plastic lens preform are selected such that the attached portion has a higher scratch resistance, a lower chromatic aberration, and/or a higher ease of edging than the lens preform.