Eyes

• retina = where the image is formed, at the back of your eyes
• pupil = the space that reflected light moves through when entering the eye(a hole)
• iris = the muscle that controls the size of the pupil
• cornea = the transparent part of your outer eye
• the retina is photoreceptive / photosensitive, which means it is sensitive to light.
• a photoreceptor is a cell that responds to light

  rod cells = sensitive to movement and dim light

  cone cells = sensitive to bright light and color
• the light is converted into an electrical impulse by retina and sent by optic nerve which travels to the brain
• the image that is formed at the back of your eyes is inverted(upside down)
• iris controls the amount of the light entering your eyes
• lens and cornea focus light that enters your eye to retina(fovea)
• when the image forms at your retina, it is inverted