Aqueous Humor - A clear fluid that helps the cornea keep its rounded shape., Blind Spot - The connection point where nerves from the retina join to the optic nerve. There are no light sensing cells here., Cornea - A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through., Iris - A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens., Lens - A clear, flexible structure that bends light and makes an image on the eye’s retina., Optic Nerve - The bundle of nerve fibres that carry electrical signals from the retina to the brain., Pupil - A hole that lets light into the inner eye., Retina - The layer of light-sensitive cells at the back of the eye that change light energy into electrical signals., Sclera - The thick, tough, white outer covering of the eyeball., Vitreous Humor - The thick, clear jelly that helps give the eyeball its shape.,

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