In this type of ARMD, there
are new blood vessels, but they are not clearly seen with the angiogram. ‘Occult’ CNV
is the term given to a specific ‘blotchy’ appearance of the
angiogram. Occult ARMD is probably an early phase of classic, see .
Regular laser is not effective, but even with PDT laser 50% of eyes lose some sight. New
anti-VEGF drugs such as Lucentis and Avastin are likely to be the
best option, perhaps in addtion to PDT. Results appear excellent for this
type of ARMD.
Occult and classic patterns can occur together. If the percentage of ‘classic’ is
high, PDT helps (early results).
The symptoms of this type of CNV are the same as 'classic
CNV' .
This type 2 occult CNV usually turns into classic CNV over the next months
or years, to cause poor central vision.
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