Fogging can be from a variety of factors.
Fogging can be a result of tear film instability, dry eye, meibomian gland dysfunction, debris within the tear chamber of the lens, too much liquid in the tear chamber, or poor fit of a scleral lens.
If the fogging is due to your tear film or dry eye, that means your eye doctor may need to start a dry eye treatment program. You may require dry eye in office treatments, medicated eye drops or other modalities.
If the fogging is due to the fit of the scleral lens, your doctor may need to adjust the parameters of the lens to achieve a more ideal fit.
In other cases, the fit of the scleral lens may be excellent, but your eye produces extra mucous or debris. In this case, it may be necessary to remove the lens, rinse with preservative free saline, and then reinsert the lens.
Ask your eye doctor if you are experiencing fogging issues with your scleral lens. It could be from dry eye or a tear film issue, or it could be a problem with the actual fit of the scleral lens.