How does the human eye focus in and out of things

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How does the human eye focus in and out of things

In: Biology

The lens in your eye is made of flexible tissue. There are muscles attached to the edges of the lens. As your brain says “Change focus”, those muscles are contracting and relaxing and this changes the shape of the lens. This is what allows you to change your focus on things close and distant.

We have a lens in the front part of our eye. The lens is slightly squishy. Muscles can flex the lens to change it’s shape. The lens focuses light onto the retina at the back of the eye, and making the lens flatter or thicker, changing what distance is in focus.

Your iris, the coloured zone of the eye, is a muscle and can stretch the pupil a bit to focus on close objects. By default, it focuses on far away objects.