Optometry Continuing Education

OCT Mastery - Tip of the Week (previous)

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120. Sudden visual loss after PDT

An 83-year-old presents with sudden visual loss after photodynamic therapy (PDT).

Tip #120

Analysis

This patient's inner retina is within normal limits. There is a presence of fluid located in the inner nuclear layer to the outer nuclear layer. In the center of the image, there is absence of both the external limiting membrane (ELM) and the ellipsoid zone (EZ). Below this area the RPE is thickened and elevated off of Bruch's membrane. To the left of the image, there is thinning of the outer retina, and the RPE. Because of this, there is increased reflectivity of the deeper tissues (a “reverse” shadow).

This patient was diagnosed with a RPE rip or tear, following the PDT procedure.

Tip #120

OCT Tip

An area of RPE atrophy adjacent to a CNV is an RPE rip until proven otherwise

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