In this particular episode of Ask an Eye Doc, you will learn:
- Why people get red eye in pictures
- Why the retina is red
This episode will make more sense if you have already listened to the following episodes:
For you readers out there, here’s the answer in written form:
Have you ever noticed that sometimes your eyes turn red in photos?
In episode 19 we learned that the pupil is a hole in the middle of the iris that lets light into the eye. In episode 7, we learned about the retina. Because the retina is full of blood vessels, it has a very orangy-reddish appearance. If you search for “retinal photos” online, you’ll see what I mean.
When someone snaps a photo of you, if your pupils are large enough, and you’re looking in the right direction, the camera will pick up the red reflex of the retina inside your eye.
And this is what causes red eye in photos! So, next time someone asks you why you have red pupils in your photo, you can let them know it means your retinas are still in place. (Or you can just edit it out with photoshop).