All terms in this list:
Eye: The organ that contains all the structures needed for sight.
Lens: A curved piece of transparent material, usually glass or plastic that refracts light. A lens is also found in the human eye.
Pupil: An opening in the eye that allows light to enter and be detected.
Retina: The lining of cells at the back of the eye. The retina senses the light reflected from the objected and sends nerve signals to the brain.
Iris: The muscular structure that opens and closes the pupil.
Opitc Nerve: The nerve that carries information from the eye to the brain.
Hand Lens: A magnifying lens that aids in seeing small objects.
Magnify: When a lens reflracts light and increases the size of an obeject's image.
Reflection: When light bounces off of an object.
Refract: When light passes through a transperent object and is bent or redirected in a different direction.
Resolution: The process that makes fine details more clearly visible.
Field Of View: The portion of a object that is visible through a hand lens or other viewing device.
Cornea: The outer layer of the eye, which helps focus light.
Brain: The part of the body that controls all voluntary and involuntary functions and all sensory function.
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