12 Matching Annotations
  1. Mar 2019
    1. the left side of the brain

      The specialization in the left hemisphere also has a lot to do with trends towards the dominant eye. In research done by Dr. David Carey, he noted that, " these asymmetries have been linked to the specialization of the left hemisphere of the brain" (Carey, D. P. 2001). The dominant eye, as most other dominant body parts, trends towards the right.

    2. where images tend to be focused

      When we focus on an image, we track it in our line of sight. Recent research done on how we see images shows"A retinal image depends not only on vertical and horizontal, but also on the torsional direction of the eye orientation"(Poljac, E., Lankheet, M. J. M., & van, d. B. 2005). In order to account for the torsion, our visual system compensates by up to +/- 9 degrees.

    3. The fovea contains densely packed specialized photoreceptor cells

      During research conducted by Vijay Gorantla, on potential eye transplants, one of the many challenges he faced was the sheer number of cells in the retina. He saw that, "more than a million retinal ganglion cells form a single layer in the retina of the human eye"(Couzin-Frankel, J. 2015). All these cells are very densely packed, as millions of them must fit in a single layer.

    4. Linear perspective

      To get an idea of how the linear perspective works, imagine looking at a painting of a big city. As the buildings get smaller, the distance appears to be further away. This is because we see two parallel lines begin to converge on each other. This is just one of the ways we use monocular cues.

    5. depth perception

      Have you ever tried throwing an object at someone? In order to hit the other person, you had to determine the distance from yourself to the target. Part of being able to perceive things in a 3D world involves gauging distance. This is one of the ways we use our depth perception.

    6. afterimage

      Imagine you are looking at a bright light and then you suddenly look away. A faint image of the light seems to follow your vision around. What is this phenomenon called?

      Answer: An afterimage

    7. the pupil will become dilated

      Imagine you're at an eye appointment, and as part of the many tests performed your pupils will become dilated. What condition(s) do your eyes need to be exposed to for this to happen? Potential answers: Low light levels. Emotional arousal. Exposure to certain drugs. Eye injuries.

    8. cornea

      What are two of the functions of the cornea? A: To be a barrier to protect the inner eye from the outside. B: To shield your eyes from the sun. C: To focus light waves entering the eye. D: To assist with night vision.

      Answers: A,C

    9. We are not consciously aware of our blind spots for two reasons:

      What are the two reasons that we are not consciously aware of our blind spot? A: The blind spot in each eye is different so they don't overlap. B: The blind spot is filled in by an approximation from our visual system. C: Our eyes are always moving and cover the blind spot. D: We just choose not to care.

      Answers: A,B

    10. another major theory of color vision is known as the opponent-process theory

      https://www.verywellmind.com/what-is-the-opponent-process-theory-of-color-vision-2795830 This article is a good source for going beyond the book's source material to understand multiple aspects of the opponent process theory.

    11. There is a point in the visual field called the blind spot

      https://www.youtube.com/watch?v=zjTCbL2wbRk This video does a good job of describing why we have blind spots.

    12. According to the trichromatic theory of color vision, shown in Figure 5.13, all colors in the spectrum can be produced by combining red, green, and blue.

      https://www.youtube.com/watch?v=l8_fZPHasdo While this video does not cover the trichromatic theory or color vision specifically, I feel it does do a good job of explaining how we see color produced by red, green, and blue color combinations.