The present invention relates to the time of the cross-linking of the cornea, it is possible in a short time ensure penetration of the riboflavin solution to the patient's corneal tissue, provide corrective corneal cross-linking for the contact lens.
A consists of UV-transparent material surrounds the side in contact with the cornea 2 of a patient, a pressing region 32 is protruded in a convex curved surface shape in position to press the center of the cornea dome, the outer periphery of the pressing region , and a relief region 34 of the annular recess of the recessed circular shape, they pressed against the cornea by changing the shape of the cornea, it is one that corrects at least the unaided visual acuity and keratoconus, further, the pressing region, the lens provided in a thickness direction outwardly, includes a reservoir unit 12 for storing the riboflavin solution, a communicating hole 44 for communicating the reservoir portion and the pressing region, a working electrode 14 having the riboflavin solution of the same polarity in the reservoir unit, while wearing the eye 1, the riboflavin solution penetrates the corneal tissue by iontophoresis and to allow ultraviolet radiation.
.FIELD 1