Understanding Vision: How the Brain Processes Images from the Eyes
Vision is a complex process that begins when light enters the eye through structures called the cornea and lens. As light is refracted, it is directed onto the retina, a light-sensitive tissue at the back of the eye. The retina contains rods and cones, which detect dim light, shapes, and color. The information gathered by these cells travels via the optic nerve to the vision area of the brain’s cortex. This intricate process allows us to perceive distance and recognize what we see in our environment.
Understanding Vision: How the Brain Processes Images from the Eyes
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Presentation Transcript
How do yousee? • Thebrainreadsimagesreceivedbybotheyesbyblendingthemintooneimage. • Thebrain uses thisinformationtogiveyou a sense of distance(howcloseorfaranobjectis).
How do yousee? • Youreyescontainstructurescalledthe cornea and thelens. • As light enterstheeye, itpassesthroughthe cornea, and isrefracted.
How do yousee? • Then, light passesthrough a lens and isrefractedagain. • Thelensdirectsthe light ontothe retina.
How do yousee? • The retina is a tissue at the back of theeyethatissensitiveto light energy. • Twotypes of cellscalledrods and cones are found in the retina.
How do yousee? • Conesrespondtobright light and color. Rodsrespondtodim light. • They are usedtohelpyoudetectshape and movement.
How do yousee? • Fromthe retina, informationpasstotheopticnerve. • Thisnervecarriestheinformation tothevisionarea of thecortex, located in yourbrain’scerebrum. • Thebrainthentellsyouwhatyou are looking at.
Theend! • (tarsier)
