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RapiDA is a simple digital dark adaptometer designed to measure slowed dark adaptation – the only functional biomarker of AMD

The eye is exposed to a moderate photo-bleach
  • Patient responds with a button press when they detect the green arc-shaped stimulus in the periphery
  • The test target is automatically dimmed and then slowly increases in brightness until it is again detected
  • Simultaneously a graphical readout appears
  • Results are reviewed by operator for error-rate and slope of the rod section of the curve