The utility model relates to the technical field of contact lenses, in particular to a
sclera lens with a prevention and
control function, which comprises an optical prevention and
control area, a middle transition area and an edge landing area. The optical prevention and
control area comprises a central area, a vision changing area and a
peripheral point
diffusion area. The central area is a smooth lens, the variable vision area is arranged on the periphery of the central area and is annular, and the
peripheral point
diffusion area is arranged on the periphery of the variable vision area and is annular. The vision changing area and the
peripheral point
diffusion area are both provided with light diffusion points, the atomization effect is achieved, the periphery of the
retina is subjected to fuzzy imaging, and the light diffusion points are hole-shaped structural parts. A vision changing area is arranged in an optical prevention and
control area, light diffusion points are formed in the vision changing area and a peripheral point diffusion area, light rays are diffused softly through the light diffusion points, the diffused light rays enable the
signal difference of adjacent cone cells on the
retina to be reduced, meanwhile, an atomization effect is presented, the periphery of the
retina is blurred to be imaged, and the retina imaging effect is improved. The purposes of reducing the retina contrast and slowing down myopia growth are achieved.