STEEP RIGID GAS PERMEABLE CONTACT LENS

The picture above is of a patient that complained that their vision was distorted and fluctuating a lot when they wore their contact lens.  Dye placed in the eye showed pooling of tears under the central portion of the lens and air bubble formation right in the visual axis.  This lens needs to be flattened to spread the tears under the lens and eliminate the air bubbles. This should improve vision.

VOGT'S STRIA

The photo below is of the cornea of a patient with keratoconus, a disease that causes an irregular cornea shape.  If you magnify the image, by clicking on it, you'll see vertical lines on the posterior surface of the cornea.  These are called Vogt's stria.  These stria are rarely seen in except in keratoconus patients.