Menicon Co., Ltd.

Osaka University

Kowa Company Limited

Mencion Co., Ltd.

Asaki Suzaki

Atsushi Kobayashi

Kazuya Miyamura

Tadashi Sawano

Hiroyuki Oyama

Yukihisa Sakai

Yuji Goto

Takashi Fujikado

Keiji Sugimoto

Shigeyasu Nagai

Mitsuhiko Nakada

Hideaki Kondo

Naoyuki Maeda

Provided is an intraocular lens having a novel structure with high utility which is easy to adapt to patients, and can improve quality of vision (QOV). In an intraocular lens, an optical characteristic is set rotationally symmetric around an optical axis, and a spherical aberration of a size corresponding to a coma aberration remaining in a patient's eye after extraction of a human lens of the eye is set.

Intraocular lens and manufacturing method thereof

The present invention provides a contact lens having novel myopia progression suppression capability, while enabling a good QOV to be obtained and ensuring myopia is kept from progressing. A contact lens having a refractive correction power for correcting myopia and myopic astigmatism set in a central region of an optical part, wherein a positive addition power in comparison with a power in the central region is set in a peripheral region of the optical part so that progression of the myopia or myopic astigmatism is suppressed, a positioning member is provided that specifies a circumferential position of the lens under a worn condition, and a lens optical axis of the optical part is set offset from a lens geometric center to align with a line of sight of a human eye under the worn condition produced by the positioning member.

Contact lens having myopia progression suppression capability, and contact lens set having myopia progression suppression capability

Disclosed is an implementation of new technology for effectively providing a contact lens capable of achieving satisfactory corrective effects even with respect to irregular astigmatism (residual irregular astigmatism) caused by a conical cornea and so forth, which could not be corrected with conventional eye glasses or contact lens, wherein the contact lens is not dependent on being made to order for each wearer but is industrially mass-producible by means of a practical and novel structure. A contact lens for correction of irregular astigmatism is disclosed wherein a positive correction area () is provided on one side of a special radial line () and a negative correction area () is provided on another side while in any of the correction areas () a lens power is configured so that an absolute value becomes progressively larger from an outer peripheral edge part towards a central portion.

Contact lens for correction of irregular astigmatism

Disclosed is a contact lens having a refractive power ranging from &#x2212;15.0 to +15.0 diopters in an optical zone thereof, wherein a back optical zone is a conical surface having a conic coefficient ranting from &#x2212;0.04 to &#x2212;0.49, and a front optical zone is a conical surface having a conic coefficient ranging from &#x2212;0.02 to &#x2212;0.50. The contact lens exhibits optical characteristics required in consideration of an optical system of an eye when being positioned at a position of rest during wear in which an optical axis of the optical zone is decentered with respect to an optical axis of the eye.

Contact lens and contact lens design method

A method of designing an ophthalmic lens, including: determining specifications of a temporary lens to provide an optical power required by a wearer; applying the temporary lens to a prescribed schematic eye, and effecting emmetropization of an optical system including the temporary lens and schematic eye; obtaining an optical characteristic of the optical system at a position of an optical axis of the temporary lens which is offset from an optical axis of the schematic eye by an offset amount; obtaining successively optical characteristics corresponding to different configurations of the temporary lens with the axes of the temporary lens and schematic eye offset by the offset amount; selecting optimum one of the different configurations of the temporary lens which gives optimum one of the successively obtained optical characteristics; and determining specifications of an intended ophthalmic lens as a final product, based on the selected optimum configuration of the temporary lens.

Method of designing ophthalmic lens and ophthalmic lens produced by the method

Disclosed is a contact lens including an optical zone having a substantially circular shape; an peripheral zone having an annular shape and located around the optical zone; and an intermediate zone having an annular shape and located between the optical and peripheral zones. The intermediate zone including a convex portion formed in at least one radial position of a back surface thereof so as to extend in a circumferential direction thereof with an outwardly curved surface as seen in a diametrical cross-section of the lens.

Contact lens

Multifocal ocular lens including a central vision correction region having a first optical power value, an outer vision correction region spaced radially outwardly from the central vision correction region and having a second optical power value different from the first optical power value, and an intermediate vision correction region located radially intermediate between the central and outer vision correction regions and having a distribution of optical power between the first and second optical power values, and wherein the intermediate region has a first transition point and a second transition point which is not radially inwardly spaced from the first transition point, such that the distribution of the optical power of the intermediate region includes two optical power values which are defined by the first and second transition points, respectively, and which are determined such that the optical power value defined by the second transition point is closer to the first optical power value of the central region than the optical power value defined by the first transition point.

Multifocal ocular lens including intermediate vision correction region between near and distant vision correction regions

Presbyopia correction contact lens including an optical zone consisting of a substantially circular central optical portion and an annular peripheral optical portion outside the central optical portion, the central and peripheral optical portions having respective different optical power values, so that the central and peripheral optical portions provide one and the other of a near vision correction region and a distant vision correction region, respectively, wherein the central and peripheral optical portions provide the near and distant vision correction regions, respectively, and the optical zone includes a front surface having an arcuate configuration with a substantially constant curvature in cross section taken in a plane parallel to a diametric direction of the contact lens, and a back surface consisting of a central portion corresponding to the central optical portion and a peripheral portion corresponding to the peripheral optical portion, the central portion of the back surface having an arcuate configuration with a substantially constant curvature in cross section taken in said plane, which curvature is different from that of the peripheral portion of the back surface.

Growing community of inventors

Kasugai, Japan

Asaki Suzaki