Ophthalmic visualization devices, systems, and methods

1. An ophthalmic visualization system, comprising:

a first lens positioned relative to a surgical microscope in a manner facilitating viewing of a central region of a retina through the surgical microscope during a surgical procedure, the first lens being positionable in an optical path between an eye and the surgical microscope during the surgical procedure; and

a second lens selectively positionable relative to the surgical microscope and the first lens in a manner facilitating viewing of a peripheral region of the retina of the eye during the surgical procedure, the second lens selectively positionable in the optical path such that the peripheral region is selectively viewable without changing the position of the first lens during the surgical procedure.

2. The system of claim 1 , wherein the first lens is an indirect non-contact lens.

3. The system of claim 2 , wherein the second lens is a prismatic off-axis lens.

4. The system of claim 3 , wherein the second lens is aligned with and rotatable about an alignment axis of the surgical microscope such that different portions of the peripheral region are selectively viewable.

5. The system of claim 1 , wherein the first lens is coupled to the surgical microscope.

6. The system of claim 1 , wherein the second lens is moveably coupled to the first lens.

7. The system of claim 1 , further comprising a third lens positioned and arranged to correct aberrations of light reflected from the eye, the third lens positioned in the optical path adjacent to the eye.

8. The system of claim 7 , wherein the third lens is a direct contact lens.

9. The system of claim 1 , further comprising a wavefront correction apparatus disposed between the microscope and the first lens, the wavefront correction apparatus being arranged to remove optical aberrations from an image viewable through the microscope.

10. The system of claim 9 , wherein the wavefront correction apparatus comprises a beam splitter in the optical path and a wavefront corrector, the beam splitter configured to direct a first portion of light from the optical path for processing, the wavefront corrector being configured to modify a phase of a second portion of light based on the processed first portion.

11. The system of claim 1 , further comprising a proximity sensor coupled to at least one of the first lens and the second lens, the proximity sensor being configured to monitor a distance between said at least one of the first lens and the second lens and the eye.

12. The system of claim 1 , further comprising an image shifting apparatus structurally configured to move an image of the retina into alignment with an alignment axis of the surgical microscope for viewing.

13. An ophthalmic visualization system, the system comprising:

a direct contact lens positionable on an eye of a patient and in an optical path of a surgical microscope;

a prismatic off-axis lens selectively positionable in the optical path between the direct contact lens and the surgical microscope; and

an indirect non-contact lens positioned in the optical path between the direct contact lens and the surgical microscope;

wherein a peripheral region of a retina of the eye is viewable without moving the eye when the prismatic off-axis lens is positioned in the optical path and a central region of the retina is viewable without moving the eye when the prismatic off-axis lens is removed from the optical path.

14. The system of claim 13 , wherein the prismatic off-axis lens is rotatable about an alignment axis of the surgical microscope such that different portions of the peripheral region are selectively viewable.

15. The system of claim 13 , further comprising a wavefront correction apparatus positioned in the optical path between the indirect non-contact lens and the surgical microscope, the wavefront correction apparatus being arranged to remove optical aberrations from an image viewable through the microscope.

16. The system of claim 13 , further comprising a proximity sensor coupled to at least one of the indirect non-contact lens or the prismatic off-axis lens, the proximity sensor being configured to monitor a distance between said at least one of the indirect non-contact lens and the prismatic off-axis lens and the eye.

17. The system of claim 13 , further comprising an image shifting apparatus structurally configured to move an image of the retina into alignment with an alignment axis of the surgical microscope.

18. A method of visualizing an eye undergoing an ophthalmic surgical procedure, the method comprising:

positioning an indirect non-contact lens in an optical path between an eye and a surgical microscope to view a central region of a retina of the eye; and

selectively positioning a prismatic off-axis lens in the optical path between the eye and the indirect non-contact lens to view a peripheral region of the retina without moving the eye and without moving the indirect non-contact lens.

19. The method of claim 18 , further comprising:

positioning a direct contact lens on a cornea of the eye.

20. The method of claim 18 , further comprising:

rotating the prismatic off-axis lens to view different portions of the peripheral region of the retina.