Patent ID: 8579436

Claim:
An ophthalmic lens for a given wearer, intended to be worn in an eyeglass frame, comprising: a prescription control point P corresponding to a downward gaze α P of between −10° and +25° and a lateral gaze displacement β P of between −10° and +10°; an upper area defined by downward gaze values, α, for the wearer, of between α P −30° and α P , along a downward gaze path, and by lateral gaze displacement values, β, for the wearer, of between β P −30° and β P +30°, parallel to a lateral gaze displacement axis; and a lower area defined by downward gaze values, α, for the wearer, of between α P and α P +30°, along a downward gaze path, and by lateral gaze displacement values, β, for the wearer, of between β P −30° and β P +30°, parallel to a lateral gaze displacement axis; wherein: the power of the lens at point P is substantially equal to the prescription of the wearer, the upper area has, relative to the point P, along the downward gaze path, a continuous average power variation ΔPui Sup , monotonic between the point P and a point P Sup , which is the point of the maximum amplitude in the variation of the power value, as an absolute value, and where the value of the average power deviation between the points P Sup and P, ΔPui SupMax =Pui(P Sup )−Pui(P), is between −0.1 and −0.4 dioptres, the lower area has, relative to the point P, along the downward gaze path, a continuous variation in the average power ΔPui Inf , monotonic between the point P and a point P Inf , which is the point of the maximum amplitude in the variation of the power value, as an absolute value, and where the value of the average power deviation between the points P Inf and P, ΔPui InfMax =Pui(P Inf )−Pui(P), is between +0.1 and +0.4 dioptres, and the average power gradient along the downward gaze path is less than 4.10 −2 ×ΔPui total , where ΔPui total =|ΔPui SupMax |+ΔPui InfMax and said average power gradient is expressed in dioptres per degree.