Ophthalmic devices, system and methods that improve peripheral vision
The present disclosure relates to devices, systems, and methods for improving or optimizing peripheral vision. In particular, methods are disclosed which include utilizing particular characteristics of the retina in improving or optimizing peripheral vision. Additionally, various IOL designs, as well as IOL implantation locations, are disclosed which improve or optimize peripheral vision.
1. A method of selecting an intraocular lens (IOL) configured to be implanted in a patient's eye, the method comprising:
obtaining at least one physical or optical characteristic of the patient's eye using a diagnostic instrument; and
selecting an IOL having an optic with a shape factor that is configured to focus light incident along a direction parallel to an optical axis at a fovea to produce a functional foveal image and is configured to improve image quality at a peripheral retinal location disposed at a distance from the fovea by reducing at least one optical aberration at the peripheral retinal location, the peripheral retinal location having an eccentricity between 1 and 30 degrees, an object in the central vision zone and an object in the peripheral vision zone defining a visual field angle, wherein the shape factor of the IOL is selected based on the at least one physical or optical characteristic of the patient's eye, and wherein a horizontal coma of the optic varies linearly with visual field angle.
2. The method of claim 1 , wherein the shape factor of the IOL is adjusted based by adjusting a parameter of the optic, the parameter selected from the group consisting of a curvature of the first or the second surface, an axial position of the optic with respect to the retina and a thickness of the optic.
3. The method of claim 1 , wherein at least one surface of the IOL is aspheric.
4. The method of claim 1 , wherein the optic has a modulation transfer function (MTF) of at least 0.5 at a spatial frequency of 100 cycles/mm for both the tangential and the sagittal foci in green light for a pupil size between 3-5 mm.
5. The method of claim 1 , wherein an average MTF of the optic obtained for a range of spatial frequencies between 0 cycles/mm and 30 cycles/mm obtained at different eccentricities between 1 and 30 degrees is at least 0.5.
6. The method of claim 1 , wherein the at least one optical aberration is selected from the group consisting of defocus, peripheral astigmatism and coma.
7. The method of claim 2 , wherein the first or the second surface comprises a plurality of optical features that are configured to reduce the at least one optical aberration.
8. The method of claim 1 , wherein the optic is a meniscus lens with a vertex curving inwards from edges of the optic.
9. The method of claim 1 , wherein the optic has a thickness between about 0.3 mm and about 2.0 mm.
10. The method of claim 1 , further comprising a second optic separated from the optic by a distance.
11. The method of claim 10 , wherein the optic is configured to be disposed in the capsular bag of the patient's eye, and the second optic is configured to be disposed between the iris and the patient's eye.
12. The method of claim 10 , wherein the optic and the second optic are both configured to be disposed in the capsular bag of the patient's eye.
13. The method of claim 1 , wherein horizontal coma of the optic decreases linearly with visual field angle.
14. The method of claim 13 , wherein horizontal coma of the optic decreases linearly from a positive value at a visual field angle of −40 degrees to a negative value at a visual field angle of +40 degrees.