PSYC 2220 Lecture Notes - Lecture 2: Retinitis Pigmentosa, Curzon Artificial Eye, Ciliary Muscle
11 Dec 2016
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Document Summary
Our vision depends on our ability to detect electromagnetic radiation ranges from short gamma rays to long radio wavelengths wavelength distance between peaks of waves (sinusoid) Cornea is responsible for 80% of focusing. The lens, which adjusts shape, accounts for the other 20% Accommodation happens when the ciliary muscles tighten to change the shape of the lens. Light rays then pass through the lens more sharply to be focused on the retina. The lens automatically changes shape to keep objects in focus on the retina, which is called accommodation. Artificial eye video: a man, blind for 26 years, was hooked up to an artificial eye. He could navigate a room and judge his distance from a wall. A tiny camera acts as an eye and converts the electromagnetic energy to electrical energy to be received by the brain. The process of accommodation starts to fail as we age the lens grows from the inside out.
