to measure retinal nerve fiber layer ( nfl ) thickness , three sets of simultaneous stereophotographs of the optic disc , taken with the donaldson fundus camera , were measured at 5 degrees intervals in a stereoplotter ( kern pg2 ) at the surface of the internal limiting membrane ( ilm ) and the retinal pigment epithelium ( rpe ) along the disc margin .
C0035298
retinal
C0035322
retinal pigment