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This occurs because some wavelengths of light are bent more when going through a lens or prism system.
Red light is bent the least, so the color red tends to focus slightly behind the retina, while blue light bends more, thus focuses in front of the retina.
This creates a mild blur because not all colors can be perfectly focused at the same time.
Cataract surgery is our signature operation, so it’s worthwhile to familiarize yourself with basic lens anatomy and surgical goals.
Now, we know the structure of the lens and we know the lens sits behind the iris …
but what keeps the lens from falling into the back of the eye?
The lens is actually suspended behind the iris by zonular fibers.
These zonules attach at the equator of the lens like trampoline springs and attach the lens to the surrounding ciliary body.