METHOD OF TREATING PRESBYOPIA Russian patent published in 2014 - IPC A61F9/00 G02C7/04 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine. A system represents a lens or a set of lenses, wherein the lens has: central optical zone with distribution of ADD power varying from the maximum falling within 0 to 2.4 dioptres to the minimum making 0 to 0.2 dioptres; a peripheral optical zone having the distribution of power providing a negative spherical aberration between an internal semi-diameter of 2 mm and an external semi-diameter of 3 mm; a transient zone between the central and peripheral optical zones adjoining thereto and providing a transition in between. A difference of the negative spherical aberration on the internal semi-diameter of the peripheral optical zone and the negative spherical aberration on the external semi-diameter of the peripheral optical zone is within the range from the absolute minimum of approximately 0.65 dioptres to the absolute maximum of approximately 1.25 dioptres. The distribution of power in the transient zone is continuous. A proper member representing a continuous displacement is included into the specified distribution of power for each lens from the set so that the distribution of power is identical for all the lenses from the set except when the members representing the continuous displacement are different for all the lenses.

EFFECT: using the given group of inventions enables the higher therapeutic effectiveness in presbyopia without reduction in a patient's intermediate or far vision at different stages of presbyopia.

20 cl, 7 dwg