59 results about "Contact lens tint" patented technology

Contact lenses and methods for preventing or slowing progression of myopia are described. The contact lenses include a vision correction area and a myopic defocus area. Various examples of the contact lenses are described. Methods include providing the present contact lenses, or applying one or more of the contact lenses to an eye or eyes of a person. The contact lenses and methods are particularly useful in children.

A contact lens providing high visual acuity with the comfort of a soft lens includes a thin layer of hard lens material at the front surface of the contact lens; and a second soft lens material layer at the posterior portion of the lens. The soft lens provides a contact area substantially in contact with the central region of the cornea. The first layer is bonded on top of the second layer directly or through a third elastic material layer. Manufacturing methods overcome problems of swelling of the soft lens component during hydration.

A contact lens includes at least two focal lengths, a single lower bearing surface capable of allowing the lens to be translated relative to an eye, and an area placed in the lower portion of the lens, the area having an outer face connected to a remainder of the outer face of the lens via a recess and the area having an inner face indistinguishable from the rest of an inner face of the lens, where the recess defines the lower bearing surface, and where the area is thin with an average thickness of the same order of magnitude as a thickness of an upper edge of said lens.

The present invention provides a contact lens having an orientation/stabilization and optionally translation feature that does not provide an prism optical distortion and can effectively maintain a predetermined orientation of the lens on an eye. Like a conventional lens ballast, the orientation feature of the invention works by weighing the lens at its lower half portion, causing it to come to an equilibrium position on the eye. With such orientation feature, the optical zone of the anterior surface can be designed independently to provide an optimal visual performance.

A monocentric bifocal contact lens with upper and lower optical power zones is connected by a transition comprising a family of sigmoidal curves. The sigmoidal curve begins with a common tangent at the boundary of the near zone and, with a reversal of sign from the near zone curve, climbs with increasing positive slope to an inflection point, whereupon it continues to climb with decreasing positive slope until reaching the distance zone curve, with which it has a common tangent. There is no discontinuity in the first derivative of the curve throughout its length. A sigmoidal curve can be constructed from numerous mathematical functions, examples of which include polynomial, conic, transendental, or cumulative distribution curves.

A contact lens including a single component lens sized and dimensioned for placement on a cornea of an eye. The single component lens includes a first base curve for the back surface of the single component lens, wherein the first base curve is associated with the first sub-axis; a second base curve for the back surface, wherein the second base curve is associated with the second sub-axis; a third base curve for back surface, wherein the third base curve is associated with the third sub-axis; and a fourth base curve for the back surface, wherein the fourth base curve is associated with the fourth sub-axis. The first base curve, the second base curve, the third base curve, and the fourth base curve are selected to form a shape for the back surface of the single component lens that conforms to a measured shape of the cornea.

A colored contact lens comprising a generally uncolored pupil region, a generally annular-shaped iris region and a multicolored pattern on the iris region. The multicolored pattern is sufficiently colored to change the apparent color of an iris of a person wearing the contact lens and comprises a plurality of color elements. The lens further comprises more than 1000 discrete generally uncolored regions defined by the color elements. At least 1000 of the discrete generally uncolored regions are sufficiently small such that an ordinary viewer viewing the contact lens from a distance of sixteen inches cannot detect the presence of any of the at least 1000 generally uncolored regions when the wearer is wearing the contact lens.

This invention provides a contact lens for myopia control comprising: an object-side surface comprising a central zone, a transition zone and a peripheral zone which are concentric and have different refractive power, at least one of the three zones being aspheric; and an image-side surface; wherein the central zone provides correction power to focus a foveal image on the retina, the peripheral zone provides a myopic defocus effect by generating a para-fovea image in front of the retina, and the transition zone with one or more focuses provides a refractive power in diopter (D) ranging from +0.25 D to +8.00 D.

The invention relates to a contact lens comprising at least one area with an increased friction for an eyelid for providing grip to the eyelid for positioning the contact lens on an eye in use, wherein said friction area comprises micro scale undulations for providing friction between an eyelid and the contact lens.

A pupil reduction corneal contact lens having a light-admitting central area surrounded by a light-blocking area. The central area can be clear or have a slight tint for reducing glare that would not reduce visual acuity to 20/25 or less. The lenses can be soft, gas-permeable or hard.

An “accommodating contact lens” or “focusable contact lens” is a contact lens comprised of a single unit lens, primarily of a rigid gas permeable material, that has one optical power ground into the lens and is fitted for the eye for clear vision at distance when the eye is in a relaxed, unaccommodated state. Unlike a standard single vision, rigid gas permeable contact lens, it has a modified anterior surface, which exists as either an excavated, concave region or heaped ridge running the entire circular midperipheral to peripheral region of the contact lens, that allows the eyelids a contact point on the lens to re-shape or move the contact lens either by squeezing or lifting it anteriorly from the eye during an attempt to accommodate or focus at near, in order to provide to the eye additional power and clear vision at intermediate or near distances.

The invention provides a multifunctional hard cornea contact lens. The contact lens comprises a lens body. The lens body is provided with an optical area, a defocusing area, a positioning area and a peripheral arc area from a center to the outside world. Through designing luminosity of a tear layer, a maximum curvature of a positioning area and relative luminosity, a myopia defocusing design is satisfied, and simultaneously, irregular cornea fitting can be well considered, an edge comfort of existing RGP in a high myopia application is improved, and universality of the lens is increased.

The invention relates to a contact lens, comprising a main body. The main body has a periphery, which has the shape with at least a pattern. The pattern can be arc, angle, square, angle after chamfering or square after chambering and so on. By the pattern wetness index of contact lens can be increased and foreign body sensation can be decreased. Comfort and stability are increased. The biggest width of contact lens is smaller than an upper-limit value so that it can not be limited by peripheral muscle of eyeball when the contact lens covers eyeball.

A contact lens (10) and method for making the same provides a cosmetic effect using pearlescent pigment (22).