An orthokeratology lens designating system 10 includes a selecting device 20, a database server 30, a lens designating server 50 and a terminal device 70. The selecting device 20 includes a device 22 for acquiring movement data of an orthokeratology lens moving on a cornea with the orthokeratology lens mounted on the cornea, and an assessing device 28 for assessing, on the basis of the lens movement data, that the orthokeratology lens is a registered lens that can be used for a patient. Registered lens correction D data of the registered lens, registered patient data including registered cornea D data of a cornea, and registration stage data that indicates in which stage of a plurality of correction stages, the lens is to be mounted on the cornea, are output to the database server 30. The database server 30 is configured to accept and store these pieces of data to build a database. The terminal device 70 includes a patient data acquiring device 71 and a patient stage data accepting means, and is capable of transmitting patient data and patient stage data to the lens designating server 50. The lens designating server 50 is configured to retrieve from the database a registered lens having registered data that are the same as or close to the received patient data and patient stage data, and to designate the retrieved registered lens as the orthokeratology lens to be used for the patient.

Changing a prescription of a contact lens includes analyzing vision-related data regarding a user (e.g., eye measurements and/or contextual information) to determine a currently needed contact lens prescription, resulting in a determined contact lens prescription; and adjusting a contact lens prescription of a contact lens embedded in the user's eye based on the determined contact lens prescription.

Method for providing a head mounted optical system, the method comprising: an optical system providing step (S1), during which an optical system with an active function is provided and, an encapsulating step (S8), during which the optical system is at least partly encapsulated in a transparent capsule by stacking in close contact the optical system with at least one substrate of the transparent capsule and made integral with an adhesive.

Method for providing a head mounted optical system, the method comprising: an optical system providing step (S1), during which an optical system with an active function is provided and, an encapsulating step (S8), during which the optical system is at least partly encapsulated in a transparent capsule by stacking in close contact the optical system with at least one substrate of the transparent capsule and made integral with an adhesive.

An eye movement measuring device for detecting an eyeball-state/movement including: an eyeball photographing device configured to take a photograph of an eyeball; and an eye movement detecting unit configured to detect eye movement based on eyeball image as a photograph taken with the eyeball photographing device, the eyeball photographing device including an eyeball illuminating unit configured to illuminate an eyeball of a subject including a driver with illumination light, an eyeball image imaging unit configured to obtain eyeball image as a result of imaging the illuminated eyeball, and an arranging unit configured such that, when the eyeball photographing device is worn by the subject, the eyeball illuminating unit is arranged in a position where the eyeball can be irradiated with the illumination light, and the eyeball image imaging unit is arranged in a position where the eyeball image can be obtained as a result of the imaging.

An eye movement measuring device for detecting an eyeball-state/movement including: an eyeball photographing device configured to take a photograph of an eyeball; and an eye movement detecting unit configured to detect eye movement based on eyeball image as a photograph taken with the eyeball photographing device, the eyeball photographing device including an eyeball illuminating unit configured to illuminate an eyeball of a subject including a driver with illumination light, an eyeball image imaging unit configured to obtain eyeball image as a result of imaging the illuminated eyeball, and an arranging unit configured such that, when the eyeball photographing device is worn by the subject, the eyeball illuminating unit is arranged in a position where the eyeball can be irradiated with the illumination light, and the eyeball image imaging unit is arranged in a position where the eyeball image can be obtained as a result of the imaging.

A method of assembling an adjustable fluid-filled lens assembly comprising biaxially tensioning an elastomeric membrane to a surface tension of greater than 180 N/m, typically greater than 1000 N/m; thermally conditioning the tensioned membrane, e.g., for one hour at a temperature of about 80 C., to accelerate relaxation of the membrane; mounting the membrane to a peripheral support structure whilst maintaining the tension in the membrane; assembling the mounted membrane with one or more other components to form an enclosure with the membrane forming one wall of the enclosure; and thereafter filling the enclosure with a fluid. The membrane may be formed from an aromatic polyurethane, and the fluid may be a phenylated siloxane. In some embodiments, the membrane is able to hold a substantially constant surface tension of at least 180 N/m for a period of at least 12 months.

Ophthalmic lenses incorporate multifocal properties for the purpose of slowing, retarding, controlling or preventing myopia development or progression, correcting presbyopic vision or allowing extended depth of focus. The lens has electronically controlled adjustable focus where the change in focus oscillates so rapidly that it is imperceptible to human vision.

The lens comprises: a first transparent substrate that includes a diffraction region in which a plurality of convex strips and groove sections are formed in alternation in concentric circles; a second transparent substrate that faces the first transparent substrate; a liquid crystal layer disposed in a space present between the diffraction region and the second transparent substrate; and a first transparent electrode and a second transparent electrode that impress a voltage on the liquid crystal layer. The diffraction region comprises a first diffraction region and a second diffraction region that is disposed in at least part of a portion different from the first diffraction region. The space comprises: groove-shaped spaces present between the groove sections and the second transparent substrate; and a communicating space disposed between at least part of the convex shapes of the second diffraction region and the second transparent substrate, and communicating between neighboring groove-shaped spaces.

An ophthalmic progressive addition lens for a myopic and presbyopic wearer having a mean refractive power, PPO(, ), a module of resulting astigmatism, ASR(, ), an acuity loss value ACU(, ), wherein the (, ) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion11340 D.sup.2.Math.deg.sup.2, and wherein: AcuityCriterion1 is defined as a combination of PPO(, ), ASR(, ), ADDp, and ACU(, ).