This eye has had Lasik, and under the corneal flap you can see a small scar. This resulted from DLK (diffuse lamellar keratitis) that can occur when debris at the flap interface causes a non-infectious inflammatory response. This condition is also called the Sands of the Sahara because of the usual wavy appearance of the scar/infiltrate … not seen here.
This scar is small and off the central visual axis, and so did not cause any visual complaints. If the reaction is severe, the flap may need to be lifted and irrigated to remove the material.
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dlkscarlasik.wmv (5.8 meg, Windows video file)