As part of the comparative study of the control of eye movements by secondary eyes, we will have to develop different methods for each species. For example, we have an eye tracker developed particularly for salticids. For other species, we will illuminate the retinas with IR light and then capture the reflection with an IR camera in order to see the movement. We will use eye-masking techniques, already developed in our laboratory, to understand the role of the secondary eyes, if any, in principal eye control.
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