Charenton-le-pont, France
Charenton-le-pont, France

Essilor International S.A. is a French company that produces ophthalmic lenses along with ophthalmic optical equipment. It is based in Paris, France, and quoted on the Euronext Paris Stock Exchange. As one of the 40 largest companies traded in Paris, it is a component of the CAC 40 share index.Essilor is responsible for creating Varilux, the world's first progressive lens which corrects presbyopia and allows clear vision in the wearer's near, intermediate and far vision. The company formed from the merger of ophthalmic firms Essel and Silor in 1972. Essilor now operates in over 100 countries over five continents. Its activities are largely focused on research and development. It is the world's largest manufacturer of ophthalmic lenses. Wikipedia.


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A lens design method includes: changing curve data including a curve value of a distance vision part and a curve value of a near vision part of a progressive power lens on an object side and a curve value of a distance vision part and a curve value of a near vision part of the progressive power lens on an eyeball side so as to be suited to prescription values to calculate a plurality of sets of the curve data; and calculating, for each of the calculated sets of the curve data, a thickness at a second position on the progressive power lens that satisfies thickness conditions for a first position on the progressive power lens.


[Problem] To provide a lens design method that has a high degree of freedom in thickness of a spectacle lens at each position. [Solving means] A lens design method includes: changing curve data including a curve value of a distance vision part and a curve value of a near vision part of a progressive power lens on an object side and a curve value of a distance vision part and a curve value of a near vision part of the progressive power lens on an eyeball side so as to be suited to prescription values to calculate a plurality of sets of the curve data (S4); and calculating, for each of the calculated sets of the curve data, a thickness at a second position on the progressive power lens that satisfies thickness conditions for a first position on the progressive power lens (S6).


A sol-gel composition for acrylic polymers-based substrate including at least a silane hydrolysate and at least an adhesion promoter including a dendritic polymer having hydroxyl and alkoxysilane groups at terminal ends thereof. An optical article coated with said sol-gel composition.


A method for evaluating fitness between an eyeglasses wearer and eyeglasses worn thereby, the method comprising the following steps:- generating facial attribute data of the wearer;- generating attribute data of the eyeglasses;- establishing a wearer model based on the facial attribute data;- establishing an eyeglasses model based on the eyeglasses attribute data;- comparing the wearer model with the eyeglasses model, and evaluating the fitness therebetween; and- based on a fitness evaluation result, generating rating score information indicative of the extent to which the eyeglasses increase the wearers aesthetic value. By way of the method, an eyeglasses wearer can conveniently learn the degree of matching between eyeglasses worn by him/her and his/her facial appearance, so as to decide whether to buy or use these eyeglasses.


The invention relates to a marking method for marking an optical article destined to a wearer, the method comprising at least:- an optical article providing step, during which the optical article is provided,- an optical article data providing step, during which data about the optical article are provided, data comprising at least information relative to the orientation of the optical article when being worn by the wearer, and- a marking step, during which a marking is formed upon the optical article, the marking being of an asymmetric configuration based on an information relative to the orientation of the ophthalmic article when being worn by the wearer.


Grant
Agency: European Commission | Branch: H2020 | Program: RIA | Phase: PHC-22-2015 | Award Amount: 6.87M | Year: 2016

Mental, cognitive, vision and hearing health problems in elderly people are amongst the top 10 public health challenges in Europe. They frequently occur co-concurrently and have an additive negative effect on quality of life and mental well-being. To address this negative impact, and promote mental well-being, particularly from a gender and minority community perspective, SENSE-Cogs aim is to: (1) understand the inter-relationship of sensory impairments and cognitive and mental health functioning; (2) identify novel means of screening/detection for diagnostic and therapeutic purposes; and (3) translate this knowledge into clinical applications for the mental well-being of EU citizens. Methods: SENSE-Cog will use a mixed methods approach with a trans-EU, UK-led, multidisciplinary collaboration of 7 EU countries with academics, SMEs, city government and patient-public voice members. We will deliver linked Work Packages (WPs) reflecting 7 themes: (1) exploration: an epidemiological analysis of 5 large EU longitudinal databases to detect risk profiles for good and poor mental health outcomes; (2) assessment: the adaptation/validation of assessment tools for cognition and sensory impairment for vulnerable populations, including the development of a composite e-screen for sensory, cognitive and mental functioning; (3) intervention: a clinical trial of a newly developed sensory support intervention; (4) participation: an EU patient and public voice and innovative public engagement network to inform the WPs and communicate findings; (5) valuation: health economic and cost effectiveness analyses; & (6) management, governance/ethics. Impact: SENSE-Cog will promote earlier detection of sensory, cognitive and mental impairments to enable swift interventions, prevent deterioration and limit negative impacts.


Patent
Essilor | Date: 2016-04-06

An optical lens having at least one of its optical surfaces comprising:- a main continuous optically functional section limited by an initial contour (CO) with an inscribed circle (Cins) having a radius greater than or equal to 10 mm,- n successive optically functional sections with n greater than or equal to 2,wherein- the main continuous optically functional section is joined to the first optimally functional section by a step,- two successive optically functional sections are joined by a step,- each optimally functional section extends radially from the center of the inscribed circle and is limited by an interior contour Cint,i and an exterior contour Cext,i with the interior contour Cint,i fully comprised in the exterior contour Cext,i ; and the smallest distance between a point of the interior contour and a point of the exterior contour being greater than or equal to 0.5 mm, and- the optically functional sections are arranged so that for any i comprised between 1 and n the exterior contour of the ith optimally functional section Cext,i is fully comprised in the interior contour of the (i+1)th optically functional section Cint,i+1, and the half-planes Pj comprising the line normal to the plane defined by the inscribed circle passing by the center of the inscribed circle, the half-planes Pj being bounded by said line, the distance between an intersection point between the half-plane Pj and the exterior contour of the ith optimally functional section Cext,i and an intersection point between the half-plane Pj and the interior contour of the (i+1)th optimally functional section Cint,i+1 is smaller than or equal to I mm.


A machine for coating an optical article with an anti-soiling coating composition, includes a vacuum chamber (8) configured to receive the optical article, a vacuum pump (20) connected to the vacuum chamber (8), a plasma generator (11) configured to carry out a vacuum plasma treatment of the optical article, an evaporation device (10) configured to carry out a vacuum evaporation treatment of the composition for depositing it on the optical article, a control unit (2) controlling the plasma generator for removing an initial outermost anti-soiling coating of the article, controlling the evaporation device for recoating the article with the anti-soiling coating composition, being configured to causes the vacuum pump (20) to suck gases from the chamber (8) during vacuum plasma treatment and being further configured to causes the vacuum pump (20) not to suck gases from the chamber (8) during vacuum evaporation treatment.


The present invention relates to a process of physical vapor deposition of a material layer on surfaces of a plurality of substrates (11), wherein:- the plurality of substrates (11) are arranged on a dome (12) which rotates according to a dome rotation axis (300);- the material to be deposited is vacuum evaporated thanks to an energy beam from a target (13);- the energy beam interacts with a beam impact surface of the target chosen within the list consisting of a part of a main surface (15) and a part of an edge (14) of the target and wherein the material diffuses from the target to the substrates around a main diffusion axis (100); and- the angle between the dome rotation axis (300) and the main diffusion axis (100) is chosen within the ranges of +5 to +40 or -5 to -40.


This invention relates to an ophthalmic lens with a low reflection both in the ultraviolet region and in the visible region, comprising a substrate provided on its rear main face with a multilayered antireflective coating (3-7 layers) comprising a stack of at least one layer with a high refractive index and at least one layer with a low refractive index, having a mean reflection factor on the rear face in the visible region R_(m )lower than or equal to 1.15%, a mean light reflection factor on the rear face in the visible region R_(v )lower than or equal to 1%, a mean reflection factor R_(UV )on the rear face between 280 nm and 380 nm, weighted by the function W() defined in the ISO 13666:1998 standard, lower than 5%, for angles of incidence of 30 and 45, the antireflective coating outer layer being a silica-based layer. The lens according to the invention does especially prevent the reflection of the UV radiation produced by light sources located behind the wearer.

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