Multiple spot photomedical treatment using a laser indirect ophthalmoscope
A laser indirect ophthalmoscope (LIO) apparatus for photomedical treatment and/or diagnosis is presented. The LIO apparatus allows multiple spot ophthalmic surgery to be performed in a wider range of patient positions and less intrusively than currently available methods. The LIO apparatus utilizes a separate or integral beam multiplier that generates one or more optical beams via spatial and/or temporal separation, and an optical system that conditions and directs the one or more optical beams to a target to form a pattern. The LIO apparatus includes a headset, and is therefore wearable by the user (e.g., a physician).
1. A photomedical system for treating eye tissue comprising:
a treatment light source configured to generate a treatment light beam;
a headset designed to be worn by a user, wherein the headset includes:
an optical input configured to receive the treatment light beam;
a beam multiplier configured to receive the treatment light beam and generate a plurality of treatment sub-beams by spatial separation of the treatment light beam, wherein the beam multiplier includes:
a reflective diffraction element configured to convert the treatment light beam into the plurality of treatment sub-beams; and
a dispersion compensating element positioned after the reflective diffraction element, wherein the dispersion compensating element is configured to receive a first treatment sub-beam of the plurality of treatment sub-beams;
a lens positioned after the beam multiplier, wherein the lens is configured to receive the first treatment sub-beam directed from the dispersion compensating element and to receive a second treatment sub-beam of the plurality of treatment sub-beams from the reflective diffraction element;
and a moveable mirror configured to receive the plurality of treatment sub beams first treatment sub-beam and the second treatment sub-beam from the lens and project the plurality of treatment sub-beams on the eye tissue in the form of a treatment pattern; and
control electronics configured to cause the treatment light source, the beam multiplier, and the moveable mirror to automatically form the treatment pattern on the eye tissue.
2. The system of claim 1 , wherein the beam multiplier is configured to receive the treatment light beam from the optical input.
3. The system of claim 2 , wherein the headset further includes a zooming lens located between the optical input and the beam multiplier for adjusting a size of the treatment beam.
4. The system of claim 2 , wherein the headset further includes a collimating lens located between the optical input and the beam multiplier.
5. The system of claim 1 , wherein the treatment pattern comprises a plurality of discrete spots on the eye tissue.
6. The system of claim 5 , wherein a number of discrete spots in the plurality of discrete spots is greater than a number of treatment sub-beams in the plurality of treatment sub-beams.
7. The system of claim 1 , wherein the treatment pattern comprises a plurality of straight or curved lines on the eye tissue.
8. The system of claim 1 , wherein the beam multiplier generates the plurality of treatment sub-beams by simultaneously dividing the treatment light beam into the plurality of treatment sub-beams.
9. The system of claim 1 , wherein the beam multiplier includes an adaptive optic.
10. The system of claim 1 , wherein the beam multiplier comprises an adjustable aperture configured to create the plurality of treatment sub-beams having a shape that is different from that of the treatment light beam.
11. The system of claim 1 , further comprising an aiming light source configured to generate an aiming beam that is combined with the treatment light beam.
12. The system of claim 1 , wherein the moveable mirror comprises an optical coating, and
wherein the optical coating white balances the plurality of treatment sub-beams.
13. The system of claim 1 , further comprising an ophthalmic lens configured to receive the plurality of treatment sub-beams and project the plurality of treatment sub-beams such that the plurality of treatment sub-beams pivot about a common point at an iris of the eye prior to being projected on the eye tissue, wherein the eye tissue is retina tissue of the eye.