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Corneal contact lenses fabrication procedure - involves calculation of cornea curvature and radius to establish lens profile with allowance for tear film thickness
Corneal contact lenses fabrication procedure - involves calculation of cornea curvature and radius to establish lens profile with allowance for tear film thickness
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机译:角膜接触镜的制造程序-涉及角膜曲率和半径的计算,以建立具有泪膜厚度的透镜轮廓
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摘要
A method is used for the fabrication of a corneal contact lens (L). A reference plane (Y) is first established which contains the iris (S3). From this plane a vertical curve across the outer surface of the cornea is defined and curvature and radius determined. In a latter stage an allowance for the lacrynal film thickness is made and the characteristics of the concave face of the contact lens established to define a second curve parallel to the first. Using these parameters the lens is constructed and modified for the degree of optical corrections required by the patient.
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