Essilor International

Essilor International (compagnie Generale D'optique)

Stephane Boutinon

Michel Nauche

David Tang

Gilles Le Saux

Helene De Rossi

Vincent Tejedor Del Rio

Guilhem Escalier

Fabien Divo

Philippe Pinault

Bernard Brechemier

A method of ordering an ophthalmic lens comprises the following steps: &#x2014;obtaining data representative of a desired correction for a wearer's eye; &#x2014;determining (S, S), using an electronic device, a lens power to be measured on a lensmeter based on the obtained data and on at least one parameter defining an expected position of the lens with respect to the wearer's eye, wherein the lens power corresponds to the power measured on the lensmeter for a lens adapted to provide the desired correction to the wearer's eye when placed at the expected position with respect to the wearer's eye; &#x2014;ordering (S) the ophthalmic lens specifying the determined power. A corresponding system is also provided.

Method of ordering an ophthalmic lens and corresponding system

A method of determining a refractive power value characterising an ophthalmic lens for correction of an individual's eye ametropia includes: obtaining first data representative of a refraction value and second data representative of a position of the individual's head with respect to a refraction apparatus when the refraction value was determined; determining the refractive power value as a function of the first data and of a relative position, derived the second data, of the refraction apparatus with respect to a centre of rotation of the eye when the refraction value was determined. A corresponding electronic device is also proposed.

Method of determining a refractive power value characterising an ophthalmic lens and corresponding electronic device

Disclosed is a lens of variable optical power, characterized in that it includes: a transparent flexible lamella; a body having a ridge inscribed in a cylindrical surface; an element able to move a first portion of the lamella, which is distinct from a second portion of the lamella making contact with the ridge, so as to deform the lamella by flection; and a liquid contained between the lamella and the body. An optical assembly including such a lens and a vision-correcting device including such an optical assembly are also proposed.

Lens of variable optical power, optical assembly comprising such a lens and vision-correcting device comprising such an optical assembly

A vision-compensating device allowing observation along an optical axis of observation with an optical correction of variable power includes a lens having, along the optical axis, a spherical power that is variable as a function of a first control, and an optical assembly generating, along the optical axis, a cylindrical correction that is variable as a function of at least one second control applied to the optical assembly. The vision-compensating device also includes a module for receiving at least one setpoint for the optical correction and a module for determining the first control and the second control depending on the setpoint by way of a mode taking into account the distance separating the lens and the optical assembly. A method for controlling a vision-compensating device and a binocular optometry device are also proposed.

Vision-compensating device, method for controlling a vision-compensating device and binocular optometry device

A refractor () includes: an enclosure having a front face containing a first optical window and a back face containing a second optical window aligned with the first optical window along an optical axis of observation; and at least one vision compensating device making it possible to observe along the optical axis of observation. The vision compensating device includes, between the first window and the second window, a first optical element having a spherical power along the optical axis, the spherical power being variable. The enclosure is mounted on an orientable holder () that is rotatable relative to a stationary portion () about a horizontal axis (H). A method for measuring refraction employing such a refractor is also disclosed.

Phoropter, and method for measuring refraction using a phoroptor of said type

Disclosed is a centering-blocking apparatus () including: a frame (); an ophthalmic lens holder (); a blocking unit () suitable for receiving a blocking accessory () with a view to depositing it on the ophthalmic lens; and a centering unit () suitable for revealing a reference system of the ophthalmic lens. According to an embodiment, the blocking unit is fixedly mounted on the frame whereas the holder is movably mounted on the frame.

Ophthalmic lens centring-blocking apparatus

The invention relates to vision compensating spectacles comprising means of support () on a wearer's face and at least one optical subassembly () mounted on the support means () opposite at least one of the wearer's eyes. The optical subassembly () comprises three optical elements mounted on the support means in series along an optical axis: a first optical element of cylindrical power for a direction of gaze of the wearer along the optical axis, a second optical element of cylindrical power for the said direction of gaze and a third optical element of variable spherical power for the said direction of gaze. The first optical element and the second optical element are adjustable in rotation about the optical axis independently of one another.

Corrective eyeglasses and method for subjective refraction by a wearer of said eyeglasses

A binocular optoelectronic apparatus for screening defects in the sight and for measuring the visual acuity of a user, includes a casing having a right-hand first aperture and a left-hand first aperture, which apertures are intended to be placed facing the right eye and the left eye of a user facing in a first gaze direction, respectively. This apparatus includes: a touchscreen placed so that a first zone of the touchscreen is located in the interior of the casing and a second zone of the touchscreen is accessible from the exterior of the casing; electronic elements suitable for displaying a plurality of optotypes on a first portion of the first zone; and an optical system configured to form a right-hand first image of the first portion of the first zone in the direction of the first right-hand aperture at a first vision distance along a first optical path.

Apparatus and method for screening for defects in the sight and for measuring the visual acuity of a user

A visual compensation system () enabling observation, with variable optical power correction, along an optical observation axis (X) includes:&#x2014;a first rotatable optical element () centered on the optical axis (X) and having a first cylinder power along the optical axis (X); &#x2014;a second rotatable optical element () centered on the optical axis (X) and having a second cylinder power along the optical axis (X); and&#x2014;a lens () having the optical axis (X) as the axis thereof, and moreover having variable sphere power.

Visual compensation system and optometric binocular device

An ophthalmic-lens holder () includes a plate () and three pads () which are mounted on the plate and rise up above the latter to offer free ends () via which they can bear the ophthalmic lens. At least one of the three pads is movably mounted on the plate.

Ophthalmic-lens holder

Method of determining at least one refractive characteristic of an ophthalmic lens, includes:

Method of determining at least one refraction characteristic of an ophthalmic lens

A device for measuring at least one camber geometrical characteristic of an ophthalmic lens provided on at least one of its faces with at least one position-identifying mark, the device including a support for the ophthalmic lens, and on opposite sides of the support, firstly lighting element for lighting the ophthalmic lens along at least two different lighting directions, and secondly acquisition and analysis element for acquiring and analyzing the light transmitted by the ophthalmic lens, the analysis element being adapted to identify shadows of the mark when lighted in the at least two lighting directions, and to deduce from their positions a measured value for the camber geometrical characteristic of the ophthalmic lens.

Device and a method for measuring a camber geometrical characteristic of an ophthalmic lens

The device includes receiver elements () for receiving the ophthalmic lens; on either side of the receiver elements, firstly lighting elements (S) for illuminating the ophthalmic lens () installed on the receiver elements, and secondly acquisition elements (C) for acquiring the shadow of the ophthalmic lens illuminated by the lighting elements (S); measurement elements (S,C) suitable for measuring the optical deflection power exerted by the ophthalmic lens on at least one light ray and for delivering a signal representative of the deflection power; and an electronic and computer system including geometrical correction calculation instructions for deducing from the measured deflection power a corrected shape for at least a portion of the shadow of the ophthalmic lens as perceived by the acquisition elements (C)

Growing community of inventors

Charenton-le-Pont, France

Stephane Boutinon