Design of corneal contact lens by wavefront technology

The design method of wavefront corneal contact lens by the objective optometry is presented. The back surface profile of the contact lens is acquired from the topographic data of the anterior corneal surface, via a fitting procedure of least square; and the front surface profile is acquired from the ocular aberrated wavefront data, via a propagation procedure through tear film and lens medium with the diffraction theory of angular spectrum. Applying the profile of the two surfaces, the prescription of the contact lens can be obtained. Eight myopic eyes with different defocusing and astigmatism are selected in this research and their corresponding contact lenses based on the wavefront aberrations have been designed. By analyzing the vergence of the designed contact lens, it is found that the vergence of the contact lens is equal to that of the eye plus to that of the tear lens while the profile of the back surface of the contact lens is spherical and the vergence of the contact lens is equal to that of the eye for the case of toroidal, then the design procedure of the contact lens is validated.