Scleral lenses are filled with saline solution before insertion to ensure crisp, clear vision. This fluid protects the cornea, and in some cases, allows it to heal in a sterile environment.
Learn more about scleral lenses here.
Hybrid contact lenses are designed with a rigid gas permeable contact lens (RGP) in the center with a soft contact lens skirt surrounding it. Hybrid lenses are typically chosen for patients with irregular corneas, such as those who have had refractive surgery in the past, or those with keratoconus. The lenses are filled with solution before insertion, creating a new ‘false’ cornea that correctly refracts light, improving vision in a way that glasses can’t.
Learn more about hybrid lenses here.