Behind the colored part of your eye is a clear lens that helps you focus. A thin layer of cells on its front keeps adding new pieces to it.
Drag to turn it around. Use the buttons to zoom in and try things from the lessons.
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The lens is a clear, bendy disc behind your pupil. It helps bend light to make a sharp picture.
Its front is covered by just one layer of small, box-shaped cells. Over the top of them is a thin, clear wrapper called the capsule.
Near the edge of the lens, these cells divide. The new cells stretch out longer and longer until they become lens fiber cells.
Each new fiber gets added on top of the older ones, like a new layer on an onion. They also help keep the lens healthy and clear.
Press Grow new fibers on the 3D model to see new fiber cells form at the edge of the lens.
Your lens never stops growing! It adds new layers slowly your whole life.