Scleral lenses are custom-fit for each person, offering superior comfort. Their large size and shape also ensure stability, so that they don’t fall out even during sports or other active lifestyle activities. As their name suggests, scleral lenses rest on the sclera, which has very little sensory input. This means that there are less nerves there than on the cornea, where most other types of contact lenses sit. This makes sclerals more comfortable, and often better tolerated than traditional rigid gas permeable or soft disposable lenses.