Patent ID: 8475437

Claim:
An irradiation system for irradiating a cornea of a patient, the system comprising: a) at least one radiation source ( 1 ) emitting a primary radiation within the range of wavelengths from 300 nm to 800 nm, which radiation causes in the irradiated cornea ( 5 ) photochemically a change in the biomechanical properties of the cornea but no photoablative effect; b) an optical system comprising at least two lenses ( 2 , 4 ) to direct the radiation towards the cornea to be irradiated, wherein means ( 7 ) are provided to adjust a temporally and spatially variable intensity distribution of the radiation; c) at least one diaphragm ( 12 ) which confines the radiation to an irradiation region ( 13 ) of the cornea; d) at least one beam-splitter ( 3 ) which couples out a part of the radiation for monitoring purposes by means of radiation detector ( 10 ), wherein said beam splitter also brings said primary radiation together with a secondary radiation of a different wavelength from a secondary radiation source; e) a sensor for sensing one of the group including the current consumption of the radiation source, a temperature of one or more components of the system, a temperature of an environment of the system, and an atmospheric humidity; f) a controller ( 7 ) receiving data from said sensor in accordance with said sensed current or temperature or, humidity and for controlling the at least one radiation source in accordance with said received data; g) a mechanical stand ( 16 ) for positioning the at least one radiation source, the optical system, the at least one diaphragm, the at least one beam splitter, the sensor and the controller in relation to the cornea ( 5 ) to be irradiated; h) an electronic interface ( 8 ) between said controller ( 7 ) and an external computer for the purpose of transmitting data selected from the group comprising duration of irradiation, dose of irradiation, and light distribution; and i) an interface ( 19 ) for the input of data by a user, said data being selected from irradiation time and irradiation dose.