Abstract: Disclosed is a method for determining an optical function of a progressive ophthalmic lens for a wearer, including: providing a prescription of the wearer; providing wearing data including at least a numerical parameter; providing by at least one processor a set of predefined optical functions including at least a first predefined optical function adapted to the prescription of the wearer and to a first predefined wearing parameter and a second predefined optical function for the prescription of the wearer and to at least a second predefined wearing data parameter, the second predefined optical function being different from the first; and determining an optical function of the progressive ophthalmic lens, so: when the wearing data parameter?a threshold value, the optical function of the lens=first predefined optical function, and when the wearing data parameter<the threshold value, the optical function=the second predefined optical function.

Abstract: A method for determining an optical system of a personalized progressive lens for a given wearer including: a) providing a mean direction of gaze determined for the wearer in a reference frame tied to the head of the wearer; b) determining a target value for at least one optical design parameter as a function of the mean direction of gaze determined in a); c) calculating the optical system of the progressive lens by an optical optimization procedure on the basis of target values, wherein the target value of each optical design parameter as a function of the mean direction of gaze determined in b) is a target value.

Abstract: An ophthalmic progressive addition lens for a presbyopic wearer which has a prescribed far vision mean refractive power a non nil prescribed addition, ADDp, the lens having a far vision reference point, a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), a meridian line, ML(?, ?), the (?, ?) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (?, ?) joining the center of rotation of the eye, CRE, and the lens, wherein ? is a lowering angle in degree and ? is an azimuth angle in degree, and wherein ? lens criterion, CRIT, fulfils following requirement: 0.38?CRIT?4.50, where: CRIT=NumeratorCRIT/DenominatorCRIT, NumeratorCRIT=(A1/A2)+(PPO(?FV, ?FV)/(100·ADDp)); A1=?100%??85%; A2=?100%??60%; DenominatorCRIT=[(PeaksMean/ADDp)+(PPO(?FV,?FV)/(8·ADDp))]3.

Abstract: An ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer which has a prescribed far vision mean refractive power and a non nil prescribed addition, ADDp, the lens having a far vision reference point, a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), a meridian line, ML(?, ?), the (?, ?) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (?, ?) joining the center of rotation of the eye, CRE, and the lens, wherein ? is a lowering angle in degree and ? is an azimuth angle in degree, and wherein a lens criterion, A1/A2, fulfils: A1/A2?0.50, wherein: A1=?100%??85%; A2=?100%??60%.

Abstract: The invention relates to a method for checking the correct assembly of a device consisting of a frame and of two corrective ophthalmic lenses. The main feature of a method according to the invention is that it includes the following steps: an initial step of determining at least one parameter which makes it possible to position the lenses in the frame relative to the face; a subsequent step of acquiring at least one image of the face of said wearer with said device, which shows centering and horizontal level marks; a step of comparing said at least one parameter determined during said initial step with the corresponding parameter deduced from said at least one image; and a step of making a decision regarding the correct assembly of the device.

Abstract: An ophthalmic progressive addition lens for a presbyopic wearer which has a prescribed far vision mean refractive power a non nil prescribed addition, ADDp, the lens having a far vision reference point, a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), a meridian line, ML(?, ?), the (?, ?) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (?, ?) joining the center of rotation of the eye, CRE, and the lens, wherein ? is a lowering angle in degree and ? is an azimuth angle in degree, and wherein a lens criterion, CRIT, fulfils following requirement: 0.38?CRIT?4.50, where: CRIT=NumeratorCRIT/DenominatorCRIT, NumeratorCRIT=(A1/A2)+(PPO(?FV, ?FV)/(100·ADDp)); A1=?100%??85%; A2=?100%??60%; DenominatorCRIT=[(PeaksMean/ADDp)±(PPO(?FV,?FV)/(8·ADDp))]3.

Abstract: An ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer which has a prescribed far vision mean refractive power and a non nil prescribed addition, ADDp, the lens having a far vision reference point, a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), a meridian line, ML(?, ?), the (?, ?) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (?, ?) joining the center of rotation of the eye, CRE, and the lens, wherein ? is a lowering angle in degree and ? is an azimuth angle in degree, and wherein a lens criterion, A1/A2, fulfils: A1/A2?0.50, wherein: A1=?100%??85%; A2=?100%??60%.

Abstract: A method for determining an optical system of a personalized progressive lens for a given wearer including: a) providing a mean direction of gaze determined for the wearer in a reference frame tied to the head of the wearer; b) determining a target value for at least one optical design parameter as a function of the mean direction of gaze determined in a); c) calculating the optical system of the progressive lens by an optical optimization procedure on the basis of target values, wherein the target value of each optical design parameter as a function of the mean direction of gaze determined in b) is a target value.

Abstract: The invention relates to a method for checking the correct assembly of a device consisting of a frame and of two corrective ophthalmic lenses. The main feature of a method according to the invention is that it includes the following steps: an initial step of determining at least one parameter which makes it possible to position the lenses in the frame relative to the face; a subsequent step of acquiring at least one image of the face of said wearer with said device, which shows centring and horizontal level marks; a step of comparing said at least one parameter determined during said initial step with the corresponding parameter deduced from said at least one image; and a step of making a decision regarding the correct assembly of the device.