Publication number: 20180314078
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.
Type:
Application
Filed:
October 11, 2016
Publication date:
November 1, 2018
Applicant:
Essilor International
Inventors:
Benjamin ROUSSEAU, Melanie HESLOUIS, Sebastien FRICKER, Nacer LAKHCHAF, Guilhem ESCALIER, Thierry BONNIN, Isabelle POULAIN, Valerie JOLIVET, Juliette WIERZBICKI
Publication number: 20180307059
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%.
Type:
Application
Filed:
October 11, 2016
Publication date:
October 25, 2018
Applicant:
Essilor International
Inventors:
Benjamin ROUSSEAU, Melanie HESLOUIS, Sebastien FRICKER, Nacer LAKHCHAF, Guilhem ESCALIER, Thierry BONNIN, Isabelle POULAIN, Valerie JOLIVET, Juliette WIERZBICKI