Ophthalmic Lenses Providing an Extended Depth of Field
An aspect of the invention is directed to an ophthalmic lens, comprising at least one optic comprising a lens zone. The zone is configured such that, when the lens is located in an average eye, for all object locations along an axis in a range from infinity to 1.0 diopters, for light having a wavelength 550 nm, the wavefront at the retina formed by the lens zone has the following characteristics 0.01 ≤ Z 40 Z 20 ≤ 5.0 , and 0.01≦|Z 60 |≦1.0 waves of 550 nm light. In some embodiments, 0.01≦|Z 80 |≦0.5 wave for light having a wavelength 550 nm.
1 . An ophthalmic lens, comprising:
at least one optic comprising a lens zone, the zone configured such that, when the lens is located in an average eye, for all object locations along an axis in a range from infinity to 1.0 diopters, for light having a wavelength 550 nm, the wavefront at the retina formed by the lens zone has the following characteristics
0.01
≤
Z
40
Z
20
≤
5.0
,
and
0.01≦|Z 60 |≦1.0 waves of 550 nm light.
2 . The lens of claim 1 , wherein the lens has a depth of field of at least 1.0 diopter.
3 . The lens of claim 1 , wherein the wavefront at the retina formed by the zone has 0.001≦|Z 80 |≦0.1 waves at all object locations between infinity and 1.0 diopter for light having a wavelength 550 mn.
4 . The lens of claim 1 , wherein
Z
40
Z
20
≤
3.0
.
5 . The lens of claim 1 , wherein
0.25
≤
Z
40
Z
20
≤
0.8
.
6 . The lens of claim 1 , wherein |Z 60 |≦0.5 waves.
7 . The lens of claim 1 , wherein |Z 60 |≦0.25 waves.
8 . The lens of claim 1 , wherein |Z 80 |≦0.075 waves.
9 . The lens of claim 1 , wherein |Z 80 |≦0.05 waves.
10 . The lens of any of claim 1 , wherein the specified values of
Z
40
Z
20
and |Z 60 | and are achieved at all object locations between infinity and 1.5 diopters.
11 . The lens of any of claim 3 , wherein the specified values of
Z
40
Z
20
,
|Z 60 | and |Z 80 | are achieved at all object locations between infinity and 1.5 diopters.
12 . The lens of any of claim 3 , wherein the specified values of
Z
40
Z
20
,
|Z 60 | and |Z 80 | are achieved at all object locations between infinity and 2.0 diopters.
13 . The lens of claim 1 , wherein the lens zone has a diameter of at least 3.0 mm.
14 . The lens of claim 1 , wherein the lens zone has a diameter of at least 4.0 mm.
15 . The lens of claim 1 , wherein the lens zone has a diameter of at least 5.0 mm.
16 . The lens of claim 1 , wherein the lens comprises only even-powered aspheric terms.
17 . The lens of claim 1 , wherein the lens is an accommodative lens.
18 . The lens of claim 1 , wherein the lens is a dual element accommodative lens.
19 . The lens of claim 1 , wherein the clear aperture is determined by the region of the optic that is optically corrected.
20 . The lens of claim 1 , wherein the lens zone is the only zone of the lens.
21 . The lens of claim 1 , wherein the lens is a multifocal lens, and the lens zone is one of a plurality of lens zones.
22 . The lens of claim 1 , wherein the lens has only two lens zones.
23 . The lens of claim 1 , wherein the lens zone has an area of at least 3 mm 2 .
24 . The lens of claim 1 , wherein the lens zone has an area of at least 7 mm 2 .
25 . The lens of claim 1 , wherein the lens zone has an area of at least 12 mm 2 .
26 . The lens of claim 1 , wherein
Z
40
Z
20
≥
0.02
.
27 . The lens of claim 1 , wherein
Z
40
Z
20
≥
0.03
.
28 . The lens of claim 1 , wherein Z 60 ≧0.02.
29 . The lens of claim 1 , wherein Z 60 ≧0.03.
30 . The lens of claim 1 , wherein Z 80 ≧0.005.
31 . The lens of claim 1 , wherein Z 80 ≧0.01.
32 . A method comprising:
performing an ophthalmic procedure on an eye optical system such that, for all object locations along an axis in a range from infinity to 1.0 diopters, for light having a wavelength 550 nm, the wavefront at the retina formed by the eye optical system has the following characteristics
0.01
≤
Z
40
Z
20
≤
5.0
,
and
0.01≦|Z 60 |≦1.0 waves of 550 nm light.
33 . The method of claim 32 , wherein the step of performing an ophthalmic procedure comprises applying an ophthalmic lens to the eye optical system.
34 . The method of claim 33 , wherein the ophthalmic lens is an intraocular lens, and the step of applying the lens comprises inserting the lens into the eye.
35 . The method of claim 34 , wherein the step of performing an ophthalmic procedure is a combined procedure, the procedure further comprising performing refractive surgery on the eye.
36 . The method of claim 35 , wherein the refractive surgery is performed after the intraocular lens is applied.
37 . The method of claim 35 , wherein the step of performing refractive surgery comprises performing a laser refractive procedure on the eye.
38 . The method of claim 36 , wherein the step of performing refractive surgery comprises altering a tilt component to the cornea.
39 . The method of claim 35 , wherein the step of performing refractive surgery comprises adding a non-lens corneal inlay or a non-lens corneal onlay to the eye.