EXAMINATION OF THE CORNEA 
                              WITH DIFFUSE ILLUMINATION



Arcus senilis is a build-up of 
cholesterol and other lipids in 
the peripheral cornea.  It 
appears as a whitish or 
yellowish ring just inside the 
limbus.  It is found in 60% of 
the patients between 40 and 
60 years old and almost all 
patients over 80, thus is 
commonly seen on 
biomicroscopic examination.