Abstract: An apparatus for the treatment and/or prevention of corneal diseases includes an applicator head. The applicator head includes a radiation source capable of exciting a non-toxic chromophore. A control is operable to activate the radiation source to radiate, wherein at least one of the following two conditions is met: the applicator head includes a sensor capable of measuring a signal dependent on a position of the applicator head relative to the cornea; or, the applicator head is configured to be in physical contact with the cornea. The control is operable to activate the radiation source to radiate depending on a signal measured by the sensor or to activate the radiation source when the applicator head touches the cornea, respectively.

Abstract: A method applying a composition to a human or non-human individual or to an object or a surface area and a pharmaceutical composition with a regimen of administering it to a human or non-human individual is provided. The composition includes an active chemical component for killing of or retarding proliferation of target cells including pathogens, infected cells and cancer cells. The application of the composition and the regimen of administration of the composition are accompanied by at least one exposure to electromagnetic radiation in a range of wavelengths in which the active chemical component absorbs and which has a lower limit of 190 nm, thereby photo-activating the active component.

Abstract: An apparatus for the treatment and/or prevention of corneal diseases includes an applicator head. The applicator head includes a radiation source capable of exciting a non-toxic chromophore. A control is operable to activate the radiation source to radiate, wherein at least one of the following two conditions is met: the applicator head includes a sensor capable of measuring a signal dependent on a position of the applicator head relative to the cornea; or, the applicator head is configured to be in physical contact with the cornea. The control is operable to activate the radiation source to radiate depending on a signal measured by the sensor or to activate the radiation source when the applicator head touches the cornea, respectively.