Hmmmmm That seems rather well thought out Mark. On 8/20/12, Marc Gilels <vasion@xxxxxxx> wrote: > Rule of thumb (My thumb). White spots are on the front lens ( Patient lens), > dark spots out of focus are in the > middle focus lenses and or CCD chip, in focus dark spots are on the field > lens. > > > > -----Original Message----- > From: CPMC Ophthalmic Diagnostic Center <cpmceyelab@xxxxxxxxxxxxxxxx> > To: 'optimal@xxxxxxxxxxxxx' <optimal@xxxxxxxxxxxxx> > Sent: Mon, Aug 20, 2012 5:14 pm > Subject: [optimal] FW: Topcon 50ex artifact > > > > > Any reason why the Allen dot on our fundus camera shouldsuddenly and > seemingly spontaneously degrade? Large, diffuse spot now inour images, > MOSTLY high myopes, but not always. See attached images. > > > > > 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 > > > > >