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.


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.


Patent
Essilor | Date: 2016-09-21

Provided is a functional dyed spectacle lens obtained by dyeing at least one of the surfaces of an undyed plastic lens, characterized in that the density of the color formed by dyeing which is defined as a difference in luminous transmittance between the dyed lens and the plastic lens is 2-4% and the difference in average transmittance in the wavelength range of 530-570 nm between the dyed lens and the plastic lens is 3-5%.


The invention relates to an optical article comprising a substrate coated with an abrasion and scratch resistant coating composed of a lower layer and an upper layer that do adhere to each other, the upper layer and the lower layer being layers of cured upper and lower layer compositions, said upper layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula R_(n)Y_(m)Si(X)_(4nm )and at least one compound, or a hydrolyzate thereof, of formula M(Z)_(x), the following ratio being lower than 2.3: said lower layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula R_(n)Y_(m)Si(X)_(4nm )and, optionally, at least one compound, or a hydrolyzate thereof, of formula M(Z)_(y), the following ratio being higher than 2.3: In the hereabove formulas, M and M are metals or metalloids of valences x and y, at least equal to 4, R and R groups are monovalent organic groups that are bound to silicon through a carbon atom and that contain at least one epoxy function, X, X, Z and Z groups are hydrolyzable groups, Y and Y are monovalent organic groups that are bound to silicon through a carbon atom, n, m, n and m being integers such that n and n=1 or 2 with n+m and n+m=1 or 2.


Patent
Essilor | Date: 2016-06-29

The disclosed embodiments include user fatigue level analysis components, real-time visual behavior measuring devices, and methods for determining the fatigue level of a user. In one embodiment, a user fatigue level analysis component includes a memory configured to store computer executable instructions and a processor for executing the computer executable instructions. The computer executable instructions comprise instructions for receiving at least a visual behavior parameter indicative of the real time visual behavior of the user, for providing at least one sleep quality history parameter indicative of the sleep quality history of the user, and for determining the fatigue level of the user based on the analysis of the combination of the at least one visual behavior parameter and the at least one sleep quality history parameter.


Patent
Essilor | Date: 2016-03-30

The disclosed embodiments include a method for monitoring the visual behavior of a person. In one embodiment, the method includes a person activity data providing step during which person activity data indicative of an activity of the person are provided; a person visual behavior data providing step during which person visual behavior data indicative of the visual behavior of the person related to said activity of the person are provided; reference visual behavior providing step during which a reference visual behavior data indicative of the reference visual behavior of the person based on said activity of the person are provided; and a comparing step during which the person visual behavior data and the reference visual behavior data are compared so as to deduce whether the person visual behavior is adapted with respect to said activity of the person.

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