FIELD: optics.
SUBSTANCE: invention relates to a lens for ophthalmic use, configured to change the depth of field. Implantable or wearable lens for ophthalmic use comprises an anterior surface and a posterior surface, where at least one of said surfaces has an aspherical refractive profile with circular or rotational symmetry with respect to the optical axis and has a geometrical height z(r) determined by expansion into a series of Forbes polynomials. Said refractive profile generates amplification of wave front W(r) emerging from the lens so as to expand the depth of field gradually and continuously in the range of optical power from −1.0 dioptres to 4.0 dioptres.
EFFECT: invention enables significant changes in depth of field without detriment to quality of vision in the reference range.
18 cl, 51 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LENS DESIGN WITH MASK AND METHOD FOR MYOPIA PREVENTION AND/OR PROGRESSION REDUCTION | 2015 |
|
RU2631210C2 |
| LENS DESIGN WITH OPTICAL FORCE PROFILE OF ARBITRARY SHAPE AND METHOD OF PREVENTING AND/OR SLOWING PROGRESSION OF MYOPIA | 2015 |
|
RU2628669C2 |
| CONSTRUCTION OF MULTIFOCAL LENS AND METHOD OF PREVENTION AND/OR SLOWING PROGRESSION OF MYOPIA | 2017 |
|
RU2671544C2 |
| MULTIFOCAL INTRAOCOULAR LENS WITH INCREASED DEPTH OF FIELD | 2015 |
|
RU2673953C2 |
| METHOD FOR ESTIMATING DIFFERENTIAL EXPONENTS FOR PERFORMANCE OF PRIMARY EXCIMER LASER CORRECTION OF WEAK AND AVERAGE MYOPIA WITH WEAK PHYSIOLOGICAL MYOPIC ASTIGMATISM | 2006 |
|
RU2332922C1 |
| METHOD FOR DETERMINING DIFFERENTIAL INDICATIONS TO APPLYING PRIMARY EXCIMER LASER HIGH DEGREE MYOPIA CORRECTION ACCOMPANIED WITH PHYSIOLOGIC MYOPIC ASTIGMATISM OR MYOPIC ASTIGMATISM OF LOW DEGREE | 2006 |
|
RU2322220C1 |
| METHOD OF TREATING PRESBYOPIA | 2012 |
|
RU2522885C2 |
| INTRAOCULAR LENS | 2011 |
|
RU2549994C2 |
| METHOD OF TREATING PRESBYOPIA | 2008 |
|
RU2471212C2 |
| INTEROCULAR LENS WITH VARIABLE CORRECTION OF CHROMATIC ABERRATION | 2010 |
|
RU2538934C2 |
