Light scattering lens for treating myopia and eyeglasses containing the same
An ophthalmic lens includes a lens material having two curved surfaces opposing each other; a light scattering region; a first aperture (e.g., clear or with reduced scattering density/power compared to the light scattering region) surrounded by the light scattering region; and a second aperture (e.g., clear or with reduced scattering density/power compared to the light scattering region) separated from the first clear aperture by a portion of the light scattering region.
1 . An ophthalmic lens, comprising:
a lens material having two opposing curved surfaces, the curved surfaces defining a lens optical axis perpendicular to a first of the curved surfaces where the lens optical axis intersects a first curved surface of the curved surfaces;
a light scattering region comprising light scattering centers, the light scattering region being defined by a first continuous portion of the lens in which the light scattering centers are spaced apart from each other by 2 mm or less; and
an elongate, clear aperture that is decentered from the lens optical axis and completely surrounded by the light scattering region,
wherein the clear aperture is defined by a second continuous portion of the lens different from the first continuous portion, the second continuous portion being free of the light scattering centers.
2 . The ophthalmic lens of claim 1 , further comprising a clear area surrounding the light scattering region, wherein the clear aperture is continuous with the clear area.
3 . The ophthalmic lens of claim 1 , wherein the light scattering region comprises optical structures sized and arranged to reduce contrast of an image viewed through the light scattering region compared with the clear aperture.
4 . The ophthalmic lens of claim 1 , wherein the lens has a region having a first optical power at the lens optical axis and a region having a second optical power different from the first optical power, and the clear aperture overlaps with both regions.
5 . The ophthalmic lens of claim 4 , wherein the first optical power is selected to correct for a refractive error of a user for distance vision.
6 . The ophthalmic lens of claim 4 , wherein the second optical power is selected to correct for a refractive error of a user for near vision or magnify to aid in near vision work.
7 . The ophthalmic lens of claim 4 , wherein the ophthalmic lens is a progressive or freeform lens.
8 . The ophthalmic lens of claim 4 , wherein the ophthalmic lens is a bifocal lens.
9 . The ophthalmic lens of claim 8 , wherein the bifocal lens is a prismatic bifocal lens.
10 . Eyeglasses comprising the ophthalmic lens of claim 1 .
11 . The eyeglasses of claim 10 , wherein an aperture axis intersects, at a non-zero angle, α, a vertical axis of a frame of the eyeglasses that is perpendicular to the lens optical axis.
12 . The eyeglasses of claim 11 , wherein the angle, α, corresponds to a path of a natural vergence path of a user's eyes when switching from distant vision to near vision.
13 . The eyeglasses of claim 11 , wherein α is in a range from 5° to 20°.
14 . The eyeglasses of claim 11 , wherein the clear aperture of the ophthalmic lens is elongated in the vertical axis of the frame of the eyeglasses.
15 . The eyeglasses of claim 11 , wherein the clear aperture of the ophthalmic lens is elongated in a horizontal axis of the frame of the eyeglasses.
16 . The eyeglasses of claim 15 , wherein the clear aperture elongated in the horizontal axis is located for near vision during use of the eyeglasses.
17 . The ophthalmic lens of claim 1 , wherein the clear aperture has an elliptical shape.