New Signs Common In Corneas With Keratoconus That Seems To Increase According To Progress Of The Disease

TO SHOW THREE NEW SIGNS FOUND IN NORMAL CORNEAS THAT ARE MORE PREVALENT IN CORNEAS WITH KERATOCONUS AND THAT SEEM TO BE MORE PREVALENT ACCORDING TO THE PROGRESSION OF THE DISEASE

EYE CLINIC OF SOUSAS

DURING THE RETROSPECTIVE REVIEW OF GALILEI EXAMINATION OF NORMAL CORNEAS AND CORNEAS WITH KERATOCONUS DURING THE PAST FIVE YEARS AT A REFERENTIAL CENTER IN THE STATE OF SÃO PAULO, BRAZIL, WE FOUND SIGNS THAT SEEM NOT BE DESCRIBED BEFORE LIKE PERIPHERAL FLATTENING OF ANTERIOR SURFACE, PARACENTRAL FLAT RING IN POSTERIOR SURFACE,AND  A CONCENTRIC RING (FRIED EGG PATTERN) IN BFS AND BFTA ELEVATION MAPS. THIS PAPER DESCRIBES THESE SIGNS AND HOW THEY SEEM TO CORRELATE WITH THE PROGRESSION OF THE DISEASE.

WE DESCRIBE THE PATTERNS OF THREE NEW SIGNS THAT APPEAR IN CURVATURE AND ELEVATION MAPS OF CORNEAS WITH KERATOCONUS. A PERIPHERAL ANTERIOR FLATTENING, A PARA-CENTRAL POSTERIOR FLAT RING, AND A CONCENTRIC RING (FRIED EGG PATTERN) ON BFS AND BFTA ELEVATION MAPS MAY HAPPEN IN NORMAL CORNEAS BUT SEEM TO INCREASE AND BE MORE PREVALENT ACCORDING TO THE PROGRESSION OF THE CORNEAL DEFORMATION. 

THREE NEW SIGNS OF KERATOCONUS ARE DESCRIBED IN CURVATURE AND ELEVATION MAPS WITH THE CGA SCALES OBTAINED WITH THE DUAL SCHEIMPFLUG AND PLACIDO GALILEI TOPO-TOMOGRAPHER. FURTHER THAN A PERIPHERAL ANTERIOR FLATTENING WE DEMONSTRATE A NORMAL CURVATURE RING (BRAZILIAN FLAG SIGN) SURROUNDING THE ZONE OF ECTASIA AND BIOMECHANICAL FAILURE. AT THE POSTERIOR SURFACE THERE WAS A PARACENTRAL FLATTER RING THAT INCREASES ACCORDING TO THE PROGRESSION OF THE ECTASIA AND MAY BE REDUCED WITH CROSSLINKING. SIMULTANEOUSLY, BFS AND BFTA ELEVATION MAPS SHOW A COMPLETE OR ALMOST COMPLETE CONCENTRIC RING WITH MORE ELEVATION AT THE CENTER THAT WE CALLED THE FRIED-EGG PATTERN AND THAT ALSO IS TALLER ACCORDING TO THE HEIGHT OF THE ECTASIA.