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Sight
How the sense of sight works
| Term | Definition |
|---|---|
| Cornea | Transparent covering over the eye, and focuses light waves that enter the eye |
| Front parts of the eye | Cornea, Pupil, Iris, and Lens |
| Back parts of the eye | Retina, Fovea, and Optic Nerve |
| Pupil | The small opening in the eye that can adjust in size depending on the amount of light passing through it |
| Iris | The colored portion of the eye and connects to the muscles that control the pupil's size |
| Lens | Attached to muscles that can change its shape to help with focusing light that's reflected from near or far objects |
| Retina | Light sensitive lining at the back and contains the fovea, which is densely packed with photoreceptors known as rods and cones |
| Cones | Help us see color and function best in brightness |
| Rods | Help us to see in darker settings |
| The Optic Nerve | Made of axons from retinal ganglion cells and carries info from the retina to the brain |
| Optic Chiasm | The point at which info from the right side of the brain is sent to the left side and vice versa |
| Occipatal Lobe | Processes all the visual info at the back of the brain |
| Amplitude | The height of a light wave |
| Wavelength | The length of a wave from one peak to the next |
| Frequency | Longer wavelengths have lower frequencies, and shorter wavelengths have higher frequencies |
| Electromagnetic Spectrum | Encompasses all of the electromagnetic radiation that occurs in our environment |
| Amplitude of Light Waves | Associated with our experience of brightness or intensity of color with larger amplitudes appearing brighter |
| The Visible Spectrum In Humans | 380 to 740nm |
| Trichromatic Theory | All colors can be produced by combining red, green, and blue using the three different types of cones |
| Opponent Process Theory | Color is coded in opposite pairs and can result in afterimage |
| Depth Perception | Our ability to perceive spatial relationships in a 3D space such as in front, behind, above, below etc. |
| Binocular Cues | Rely on both eyes, and uses binocular disparity which is the slightly different view of the world that each of our eyes receives |
| Monocular Cues | Cues that only need one eye such as interposition, the partial overlap of objects, the relative size and closeness of images to the horizon, and the variation between light and shadow |
| Vestibulo-Ocular System | Achieved by integrating info from both the visual and vestibular system |
| Synesthesia | When one sensory signal gives rise to two or more sensations |
Created by:
edrag26
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