Methods and devices for crosslinking of corneal collagen and for treatment of disorders of the eye
Methods and devices for delivering therapeutic or diagnostic energy (e.g., light, ultrasound, ionizing radiation (e.g., x-ray), vibration, heat energy, etc.) into the eye. An energy emitting device is positioned on the eye and used to deliver energy into the eye. The device may be constructed to allow the subject's eyelids to open and close while the device is positioned on the eye. The device is useable for various energy based or energy-mediated therapies, including crosslinking of corneal collagen, light therapy, photodynamic therapy, photo-activation of drugs, etc.
1. A method for delivering therapeutic energy to an eye of a human or animal subject, said method comprising the steps of:
a) administering a crosslinking agent to the eye; and
b) placing on the subject's eye an ultraviolet light-emitting contact lens that allows the eye lids of that eye to open and close while the ultraviolet light-emitting contact lens is positioned on the eye, and causing the ultraviolet light-emitting contact lens positioned on the eye to deliver therapeutic energy into the eye sufficient to effect crosslinking of corneal collagen.
2. The method according to claim 1 wherein the contact lens emits ultraviolet light into the cornea of the subject's eye.
3. The method according to claim 2 wherein the ultraviolet light entering the cornea causes a photo-antimicrobial effect.
4. The method according to claim 1 wherein the agent comprises riboflavin.
5. The method according to claim 1 wherein the contact lens comprises a lens body and at least one light emitter.
6. The method according to claim 1 wherein the contact lens emits ultraviolet A light.
7. The method according to claim 6 wherein the ultraviolet A light is emitted with fluence of 5.4 mJ/cm 2 with a corresponding irradiance of 3 mW/cm 2 .
8. The method according to claim 6 wherein the contact lens emits light having a wavelength of 360 to 370 nanometers.
9. The method according to claim 6 wherein the contact lens emits light having a wavelength of 365 nm.
10. The method according to claim 6 wherein the contact lens emits light having an intensity of about 3 mW/cm2 for a desired period of time.
11. The method according to claim 6 wherein the light is delivered into the cornea for at least 30 minutes.
12. The method according to claim 1 wherein the contact lens comprises a light emitter of a type selected from the group consisting of: light emitting diodes (LEDs), micro light emitting diodes (micro LEDs), laser diodes, blue micro LEDs, light emitting chips, light emitting semiconductors, microchip lasers and other emitters of UVA or blue light.
13. The method according to claim 1 wherein the agent is applied topically to the cornea.
14. The method according to claim 1 wherein the agent is initially on or in the contact lens and is subsequently delivered from the contact lens into the eye.
15. The method according to claim 1 further comprising the step of removing or disrupting at least a portion of an epithelial layer on the cornea of the eye.