Vision - the sense of seeing and sight
Transduction- changing physical energy into electrical signals that can move to the brian Visual Accommodation - the process of the eye adjusting and focusing Feature Detectors - nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement Nearsighted - the ability to see near objects more clearly than far objects, also know as Myopia Farsighted - the ability to see objects more clearly in the distance rather than up close, also know as Hyperopia Color blindness- condition of the inability to distinguish colors, can be mild to severe |
|
Intensity- refers to light and sound waves (defined as the amount of energy in a light or sound wave).
Brightness- a term that describes the intensity of light. Complexity- description of the saturation level ( or lengths of light waves). Saturation- when a substance which has been combining with another substance and has reached the point where there is no space for any more. Visual cortex- part of the cerebral cortex in the back base of the brain that is associated with vision. Hue- refers to aspect of color that is determined by the wavelength of light. |
|
Rods - Rods visual receptor cell; located in retina; 120 million in each eye; respond to varying degrees of light and dark; chiefly responsible for night vision and perception of brightness.
Cones - visual receptor cells; located in retina; 8 million in each eye; works best in bright light; chiefly responsible for viewing color; greatest density in the fovea. Helps protect and reflect light. Optic Nerve - bundle of axons from ganglion cells that carries no messages from the eye to the brain Visual Cortex - that part of the cerebral cortex responsible for processing visual information. It is located in the occipital lobe, in the back of the brain. Occipital Lobe - the portion of the cerebral cortex lying at the back of the head; includes the visual area, which receive visual information from the opposite visual field. Wavelength - the distance from the peak from the sound wave/light to the next.-->determines hue |
|
Opponent-process theory - our ability to perceive color is controlled by three different color receptors. These three receptors are the red-green , the blue-yellow and the black-white complex. According to the theory, you can only see on of these colors at a time because they are opposite of each other.
Parallel processing - to the ability of the brain to do many things at once. EX: When you see an object you don't just see the object you see the many different characteristics of the object to help you identify it. Young Helmholtz/trichromatic theory - theory that says there are three different color receptors in the eye (RGB) and that these three colors can make up any other color in the spectrum of colors. Blind spot - a specific place on your retina which lacks the light-detecting photoreceptor cells Visible Spectrum - portion of the electromagnetic radiation the human eye can see, more commonly known as ROYGBIV. These colors fall somewhere between 380nm-700nm about the thickness of a soap bubble membrane. |
Cornea-the outer layer of the eye. This part of the eye protects it from germs and possibly dangerous objects. The cornea bends the light that enters the eye. The three layers of the cornea include the endothelium, stroma, and epithelium.
Fovea-the area in the retina in which the cones are close together. This part of the eye helps focus on small images or detail. the fovea lets light fall directly on the cones which helps focus the images. Iris-this is the part of the eye in which the color of your eye is determined whether it be blue, black, or green. It is actually muscle tissue around the eye that helps control the opening of the pupil. This helps in regulating the light that enters the eye. Pupil-this is the section of the eye that allows light to pass through the eye. It is actually an opening that is controlled by the iris. lens-this is the part of the eye which changes its shape to focus on images. This shape helps the eye focus the light being received to be transported to the retina. Retina-this is the part of the eye that contains the cones and rods of the eye. These help change images, to electrical impulses to the brain. |
|