Handout - Lecture 9 - Vision

Handout - Lecture 9 - Vision - Vision October 16, 2008 Fact...

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Click to edit Master subtitle style 9/30/09 October 16, 2008 Vision
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9/30/09 Fact or Fiction?? The visual system is the least developed sense at birth. True. Our eyes are always the same size from birth. False. (In terms of the diameter the eyes of a newborn are smaller than an adult, but by 3 months it is fully developed.) Reading in dim light is harmful to your eyes. False. Eyes cannot be transplanted. True. (Parts of
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9/30/09 Today’s Topics Basic Anatomy of the Eye Photoreceptors Receptive Fields Visual Pathways in the Brain Face Recognition
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9/30/09 The Human Eye
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9/30/09 Basic Anatomy of the eye… Ciliary body: comprises two parts – the ciliary process and the ciliary muscle. It is the latter which causes the lens to change shape. Cornea: Although normally only half a millimeter thick, the cornea is responsible for seventy percent of the total focusing of the eye. It is the most important layer in the refractive procedure and, together with the lens, forms a clear image on the back of the retina. Iris: The iris is a thin diaphragm that lies behind - and is visible through - the cornea. The iris contains the pupil, which dilates and constricts to regulate the light that reaches the retina. (color of the eye)
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9/30/09 Basic Anatomy of the eye… Optic nerve : is responsible for carrying information about the image to the brain. It contains no sensory receptors itself, and therefore therefore the head of the optic nerve (otherwise known as the Optic Disc) corresponds to the normal blind spot of the eye. Choroid: runs behind the retina and, at the front of the eye, forms the ciliary body. As it contains many blood cells, the choroid supplies the eye with nutrients and oxygen – as well as removing waste. (layer of blood vessels) Retina: The back of the retina contains a deep
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9/30/09 Retina – Cones and Rods Retina is light sensitive tissue that lines the back of the eye. This is where the main action happens. It is made up of 2 main types of light-
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This note was uploaded on 02/15/2009 for the course PSY 0505 taught by Professor Ericdonney during the Spring '09 term at Pittsburgh.

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Handout - Lecture 9 - Vision - Vision October 16, 2008 Fact...

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