I will need photos of both of your eyes for a couple of reasons.
First, the majority of markings in your right eye come from your father, while the majority of markings in your left eye come from your mother.
Second, some organs are only found on one side of the body (eg the spleen). As such, they will only be reflected on that side's eye.
Watch this video to learn how to take the best photos.
Quality photos are vital. The Iridology assessment is only as good as its photos, so take as many as needed to get the most well lit, clear photos.