Nevertheless, several studies show a decrease in visual performance when SsCLs was fitted.
In general, there is an agreement that mini and large SsCLs, when settled onto the eye, should display a central clearance of around 200 fm and 75 fm at the limbus .
Corneal vaulting, centration, and excellent comfort have allowed expanding the use of C-SsCLs and mini SsCLs to less severe KC cases.
Mini ScCLsl and, mainly, large SsCLs are the preferred designs for fitting severe irregular corneas or postkeratoconus surgery (CXL, ICRS, or penetrating keratoplasty).
SCLs, RGPCLs, PBCLs, HCLs, C-SsCLs, and SsCLs form the contemporary range of available lens types for the management of KC with CLs.
SsCLs are the ones that provide the best results in comfort and vision when the disease has progressed.