Using the actual K values with a target of low myopia is a suitable option for spherical IOL selection for eyes with a mean K of ≤55 D. When there is severe keratoconus, the use of actual K values can result in a large hyperopic error and the use of standard K value in these eyes should be considered.
ScCLs continue to play a significant role in the management of corneal abnormalities, especially PCE, corneal transplant, and OSD. The great majority of lenses in use were nonventilated RGP designs.
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