Hi Denise I use the Cirrus here, and know that you have to look at the placement of each RNFL crosshair placement for just that reason, the machine can place the ON center so far off that you end up with really bad results! I know to look for that problem, but the fill-in techs that are just thrown into the camera room have no clue-even tho samples are posted about what to look for. Lori -----Original Message----- From: "CPMC Ophthalmic Diagnostic Center" <cpmceyelab@xxxxxxxxxxxxxxxx> Sent: Friday, September 20, 2013 1:49pm To: "'optimal@xxxxxxxxxxxxx'" <optimal@xxxxxxxxxxxxx> Cc: "'spectralis-user-group@xxxxxxxxxxxxxxxx'" <spectralis-user-group@xxxxxxxxxxxxxxxx> Subject: [optimal] From Denice re Spectralis Segmentation Somewhat alarmed to see today that two separate RNFL scans, seemingly reasonable well centered, can show such different results based on where the instrument choses to segment. A very slight, nearly inperceptable adjustment on my part took this patient out of the red zone and back into borderline. Your thoughts? ART set at 16. Too much? Too little? Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS Ophthalmic Diagnostic Center CPMC Department of Ophthalmology 2100 Webster Street Suite 212 San Francisco CA 94115 (415) 600-3937 FAX (415) 600-6563