Invention Grant

Contact lens
Abstract:
A contact lens includes, in order from a center to a periphery, an optical zone and at least two structural zones. The optical zone includes a front surface and a back surface, wherein at least one of the front surface and the back surface is aspheric, and the optical zone provides a positive force or a negative force. The structural zones concentrically surround the optical zone, wherein one of the structural zones provides a positive force, and the other of the structural zones provides a negative force. A composition for manufacturing the contact lens includes at least two kinds of monomers, at least one kind of crosslinking agent, at least one kind of diluent and at least one kind of initiator.
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