They are talking about single images taken on Optos or fundus camera. Not an
averaged image like the Spectralis.
Thanks,
Tim Steffens
From: optimal-bounce@xxxxxxxxxxxxx <optimal-bounce@xxxxxxxxxxxxx> On Behalf Of
Miller CRA OCT-C Gary
Sent: Monday, April 5, 2021 5:38 PM
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Subject: [optimal] Re: [External] Re: FAF before colors
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Tim,
Trying to understand what the docs meant by "washed out". Does it mean a flat
(low contrast) image or an image that photogs may call overexposed?
Perhaps the sensitivity dial being set too high, or the capture time going too
long could give the FAF a "washed out" appearence....
Gary
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Hi Tim,
"with the Spectralis, we let the light expose the lipofusin for 20 seconds
before we take the image" Are you saying that you expose the pt to that bright
FA/FAF light for 20 sec, and then take the FAF? I have never done this, and I'd
like to think our patients are grateful for that! Also, I do try to always get
FAF prior to colors, to avoid the Zeiss circle or Spectralis rectangle bleach
mark.
Sean Grout
UNC Kittner Eye Center
Chapel Hill, NC
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Hi all,
I have two docs requesting FAFs before colors because they were at virtual
conference and heard that FAF can be washed out even when obtained after a
color photo. This came from Vas Sadda, chair at USC. Has anyone heard of this?
I know with the Spectralis, we let the light expose the lipofusin for 20
seconds before we take the image because then the lipofusin is at its peak
emission. We can't do that with a fundus camera or LSO (Optos) because it a
single capture, the light is not constantly on. I would think that exposing the
retina to blue or green light (488 or 540nm) would help saturate the lipofusin
to emit more fluorescence or closer to peak fluorescence. Comments?
Thanks,
Tim Steffens
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