PRESBYOPIA LENS SYSTEM Russian patent published in 2016 - IPC G02C7/04 

FIELD: physics, optics.

SUBSTANCE: lens pair satisfies the conditions: $$\overline{D}\ge -\mathrm{1,0}\times ADD+\mathrm{0,53}$$ , $$\overline{N}\ge -\mathrm{1,40}\times ADD$$ , $$\overline{\Delta }\le \mathrm{1,65}\times ADD-\mathrm{1,2}$$ , where $$\overline{D}$$ is the average value of the maximum monocular characteristic of a far object; $$\overline{N}$$ is the average value of the maximum monocular characteristic of a near object; $$\overline{\Delta }$$ is disparity, and ADD is near addition.

EFFECT: providing optimum near vision correction, preferably with accompanying far vision correction.

21 cl, 8 dwg, 4 tbl