A functional 3D eye model is to demonstrate how your eye work or functions.
Step 1: List of Material
extra and small large paper towel roll
3 magnifying glass
Draw a pupil in the center of your white ping pong ball that is approximately one-half-inch wide using black marker. Draw a black circle as the pupil and then color it in.
The pupil and iris make up the cornea.
Add lines for the iris extending all around the pupil roughly 2 inches long using a dark blue marker. The lines are roughly one-sixteenth-inch apart and are all around the pupil.
Draw a 1 1/2-inch circle in the center of your Styrofoam ball. Carve out the circle approximately 1-inch deep using a sharp knife. An adult needs to perform this task.
Insert your drawn ping pong ball into the hole. Face the pupil and iris outwards. Cut out more Styrofoam if needed to fit the ping pong ball into place. It needs to be almost flush to the surface of the Styrofoam ball.
Dip your fine artist paintbrush into red acrylic paint. Paint a group of red lines side-by-side 2 inches wide and 2 inches long for the medial rectus muscle. Form the lines so they are almost touching. Add similar grouping of lines on each side of the Styrofoam ball.