A light irradiation device including an optical fiber and a light transmissive optical path changing member for changing an optical path of light entering from the optical fiber, disposed on a distal side relative to the optical fiber. The optical path changing member includes a proximal side member disposed on a proximal side of the optical path changing member and a distal side member disposed on a distal side of the optical path changing member. The proximal side member and the distal side member are in contact with each other to form a boundary surface, and the boundary surface is inclined relative to a vertical plane of a central axis of the optical fiber.

A system to couple light to tissue includes a first light source configured to emit first light of a first wavelength lambda λ.sub.1 and a second light source configured to emit second light of a second wavelength λ.sub.2. The system also includes a retro-modulator configured to receive the first light and the second light. The retro-modulator is configured to modulate the first light of the first wavelength λ.sub.1 based at least in part on an intensity of the second light of the second wavelength λ.sub.2. The retro-modulator is also configured to reflect the modulated first light for use in generation of a guide-star within the tissue.

The invention relates to an irradiation apparatus for the prophylaxis of hearing impairment and/or vertigo, to a system of functionally connected apparatus components which interact with each other, and a method that uses the irradiation apparatus for the prophylactic irradiation of the inner ear with photons in order to prevent hearing impairment and/or vertigo in a wearer of the irradiation apparatus.

A phototherapy device includes a high intensity light source secured to a leaky light conducting fiber to leak light along the length of the fiber. The light fiber is illuminated at either or both ends by the light source and the light fiber is generally oriented in a 3-D spiral pattern to form a dome of light to provide phototherapy to an area of a patient's scalp to be treated. A generally hemispherical shell is formed of a first or inner translucent diffuser layer secured to a second or outer reflective layer, the first and second layers encapsulating the 3-D non-overlapping spiral pattern light fiber. A control system is also provided to turn off the light source when a break or discontinuity occurs in the fiber.

There is described an implantable apparatus for interacting with biological tissue. The apparatus generally has a base; a plurality of strands each having an elongated body with a proximal end fixed to said base and a distal end opposite the said proximal end, the plurality of strands being entwined with one another to form a thread of entwined strands; and a plurality of biological interaction devices extending between the base and the plurality of strands, the biological interaction devices each having a biological interaction element located along the elongated body of a corresponding one of the plurality of strands and interacting with surrounding biological tissue when the thread of entwined strands is implanted into the biological tissue.

A wearable ultraviolet light phototherapy device is disclosed. The wearable ultraviolet light phototherapy device can have a substrate or a housing that is to be worn on a body part of a patient. At least one ultraviolet light emitting source located about the substrate or housing can deliver ultraviolet radiation into the body part of the patient. A control module can control operation of the at least one ultraviolet light emitting source. To this extent, the control module can direct the at least one ultraviolet light emitting source to deliver a predetermined amount of ultraviolet radiation at a peak wavelength into the body part of a patient. The control module can determine the predetermined amount of ultraviolet radiation as a function of the patient's susceptibility to ultraviolet radiation.

A bacteria removal laser is provided, especially for removing caries bacteria from natural or prosthetic teeth, the prosthetic teeth also being treated via extraoral approach, having a gripping handle, a laser radiation source, an application optics having a predetermined radiation exit surface, especially a radiation guide rod through which laser radiation passes, and an energy source such as a mains connection or an accumulator. The laser emits in the wavelength range between 2200 nm and 4000 nm and is especially designed as an Er:YAG laser. The energy output averaged over time is less than 1 mJ/mm.sup.2 at the radiation exit surface.

The embodiment discloses a rhinitis treatment device including a frame covering a nose; a substrate disposed inside the frame; and a plurality of light emitting devices disposed on the substrate, wherein the substrate includes: a pair of first regions spaced apart from each other in a first direction to face both sides of the nose; and a second region disposed between the pair of first regions and extending in a second direction from a tip of the nose toward a root of the nose, and wherein the plurality of light emitting devices includes a plurality of first light emitting devices disposed in the pair of first regions.

The present invention relates to a mask device for skincare using light. The mask device for skincare using light includes: an outer mask unit; an inner mask unit located to be spaced apart from the outer mask unit; and a plurality of optical sources located between the outer mask unit and the inner mask unit and configured to output light towards the inner mask unit. The inner mask unit includes a substrate including a first surface having a plurality of recesses and a second surface located opposite to the first surface, and the optical sources are located to face the recesses, respectively.

Systems and methods for restructure and stabilization of bones that provide an anti-microbial effect are disclosed herein. A device includes a delivery catheter having an inner void for passing at least one light sensitive liquid, and an inner lumen; an expandable member releasably engaging the distal end of the delivery catheter; at least one channel positioned in the expandable member; and a light conducting fiber sized to pass through the inner lumen of the delivery catheter and into the expandable member, wherein, when the light conducting fiber is in the at least one channel, the light conducting fiber is able to disperse light energy to provide an anti-microbial effect. When the light conducting fiber is in the expandable member, the light conducting fiber is able to disperse the light energy to initiate hardening of the light sensitive liquid within the expandable member to form a photodynamic implant.