AN OPHTHALMIC PROGRESSIVE ADDITION LENS FOR A MYOPIC OR EMMETROPIC PRESBYOPIC WEARER; METHOD FOR PROVIDING SUCH A LENS

• Main Authors: ROUSSEAU BENJAMIN, JOLIVET VALERIE, LAKHCHAF NACER, BONNIN THIERRY, ESCALIER GUILHEM, HESLOUIS MELANIE, FRICKER SEBASTIEN, WIERZBICKI JULIETTE, POULAIN ISABELLE
• Format: Patent
• Language: Chinese; English
• Published: 08.06.2018
• Subjects: CONTACT LENSES; OPTICS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES

An ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer which has a prescribed far vision mean refractive power, a non nil prescribed ADDp, said lens having a far vision reference point, a mean refractive power, PPO([alpha], [beta]), a module of resulting astigmatism, ASR([alpha], [beta]), a meridian line, ML([alpha], [beta]), said ([alpha], [beta]) functions being determined in as-worn conditions of the lens by the wearer for gaze directions ([alpha], [beta]) joining the center of rotation of the eye, CRE, and the lens, where [alpha] is a lowering angle in degreeand [beta] is an azimuth angle in degree, and wherein a lens criterion, A1/A2, fulfils following requirement: A1/A2 >= 0.50, where: A1 = [alpha]100%-[alpha]85%; A2=[alpha]100% -[alpha]60%. 种用于近视眼或正视眼且老花眼配戴者的渐变多焦点眼科镜片，所述镜片具有处方视远平均屈光力、非零处方下加光ADD，所述镜片具有视远参考点、平均屈光力PPO(α，β)、结果散光模数ASR(α，β)、子午线ML(α，β)，所述(α，β)函数是在所述配戴者戴着所述镜片的条件下针对将眼睛的转动中心CRE与所述镜片相连的注视方向(α，β)确定的，其中α是以度为单位的降低角，并且β是以度为单位的方位角，并且其中镜片指标A1/A2满足以下要求：A1/A2≥0.50，其中：o A1＝α1