In many ways, your eyes work a lot like a camera. First, light bounces off of the object you are looking at and hits the cornea. The cornea is the clear outer layer of your eye. The cornea helps to focus the light waves and they are sent through the pupil (the black circle in the center of your eye). When we use the camera analogy, the pupil works in much the same way as the aperture on the camera.
Your pupil will open to a certain width depending on how much light there is available. Your iris, the colored part around your eye, controls how far the pupil opens.
Next the light rays pass through the lens of the eye. The lens is shaped a little like a sphere, but it can change shape to bend the light rays further and focus them onto the retina at the back of your eye. The retina is the membrane at the back of the eye.
The retina contains rods and cones. Rods help you see light and motion while cones help you see colors and details. Rods and cones are photoreceptors in your eyes that contain chemicals. These chemicals change when the rods and cones are hit by light.
When the focused light rays hit the retina, the cells in the retina convert the light into electrical signals.
These electrical signals are sent through the optic nerve to your brain where your brain interprets the information to produce an image.
Although this is a complicated process, it all happens very fast, which is why you can see where you’re going when you walk around.
All the parts of your eye work together to focus light, interpret it, and send the signals to your brain.
To learn more about how your eyes work, and to protect your eyesight, schedule an appointment at the Aloha Eye Clinic.
Regular checkups can help you catch problems early, correct your vision, and treat any issues before they get worse.