Retinal Photographs (IMAGE) University of Kentucky Caption Geographic atrophy is induced by DICER1 reduction as seen in the retinal photograph (top right, blue arrowheads). This is prevented by blocking Alu RNA (top left). Flat mount pictures show that the degeneration of the RPE cells induced by DICER1 reduction (bottom right) is prevented by blocking Alu RNA (bottom left). Credit Ambati Laboratory/University of Kentucky Usage Restrictions Must credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.