00:00If you took out your eye and sliced it in half, you might expect it to be mostly empty with some tendons and nerves inside.
00:07But your eyeball is actually filled with a clear jelly-like substance, which makes up about 80% of your eye's volume.
00:15This gives it its round shape and helps keep everything in place.
00:19It also helps cushion your eye from impacts, protecting the sensitive retina at the back.
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