Optical coherence tomography imaging of the back of the eyes of healthy participants to develop automated measurement software

The choroid and layers of the posterior eye will be imaged using the Triton swept source OCT angiography instrument in participants with healthy eyes to allow development of automated segmentation software. The software delineates the thickness of individual tissue layers in the eye. The software can be later used in the development of myopia interventions to slow eye growth. The images provide a cross section of the eye tissues. The scanning protocols to be used include: • Horizontal line scans (9 mm width) – 6 times • Five-line cross scan (6 mm width) – 6 times • Radial scan pattern (6 mm width) – 6 times • Angiography scans – 3D Macula (3 mm volumetric) – 6 times A typical scanning protocol involves: • Adjusting the participant’s head/eye position in the Triton headrest until they can see the Triton’s internal fixation target • Instructing the participant to continue watching the fixation target during the scans and the likely length of the scan time • Instructing the participant to blink twice and then waiting 2-3 seconds before the scan commences to ensure a high-quality tear distribution and optimal scan quality • Instructing the participant to sit back from the instrument and relax before commencing the next set of scans The scanning protocol typically requires a few minutes per scan and there are four different scanning protocols. There will be a single visit with total duration of about 60 minutes.