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Hi @faker, thank you for your query. I am afraid that the only means by which the left and right eye data are separately exposed for the 4C is through the Tobii Pro SDK which requires the purchase of a special research licence to correctly operate.
If you are interested in this, please contact the team as provided @ https://developer.tobii.com/license-agreement/
Do let us know if you require any further information. Best Wishes.