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Choroidal
Naevi
9
Diagnostic Atlas
A Retinal Reference Guide
Green Channel
Red Channel
Using different channels to distinguish
Choroidal Naevi from Choroidal Melanoma
Choroidal Naevus
Choroidal Melanoma
Composite View
Naevus disappears
in green channel
Naevus is visible
in red channel
Choroidal Melanoma
Choroidal Melanoma
Melanoma is visible in both channels
Choroidal melanoma can be visualised on all
channels of an
opto
map image. This is a
diagnostic distinction from a choroidal naevus
which appears only in the red channel.