Good Hope Eye Clinic

Occult, type 2 no PED wet ARMD

David Kinshuck

'Occult' CNV type 1 (no PED)

type 1 CNV ('occult')

type 1 cnv

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 . Occult and classic patterns can occur together. Anti-VEGF drugs generally help. The symptoms of this type of CNV are the same as 'classic CNV', except the condition takes longer to develop. Without treatment, this type 2 occult CNV usually turns into classic CNV over the next months or years, to cause poor central vision.

  • Large occult membranes can develop haemorrhages with anti-VEGF treatment (BJO 2008).
  • photo   another   another..occult/mixed    another   flash   another    large diagram
  • The term occult is not really used now: the condition is a subtype of wet armd sometimes termed type 1 cnv.
  • Sometimes there is a hyper-reflective material which is related to prognosis, and to pachychoroidopathy (= thickened choroid).
  • Sometimes there is fluid, but if the fluid is stable injections don't seem to help.
  • This is similar to the type 1 cnv below, the difference being there is no ped

occult cnv, no PED

Photograph and fluorescein agniogram, late leakage = occult type wet ARMD. Treaterd with anti-VEGF drugs