Sunday, April 22, 2012
Dynamics in the Paralytic Child
The Fake Horse: Handicapped in Time or Space?
Sunday, April 15, 2012
Children and Art
Tuesday, April 10, 2012
Sacks & Sue
Reading Sacks’ article, I became acutely aware of my own eyes and the distance between them. An artist is taught that they should leave one eyes-length between the two. While I have long been privy to the notion that the eyes of prey are typically set farther apart than predators, It never occurred to me that this would effect their 3D perception. After regaining stereoscopic vision, Sue became more aggressive (predatory?) on the road—should we then equate the monoscopy caused by strabismus with defensiveness? I am curious, now, about vision in arachnids and other insects with more than two eyes. The media tends to portray an insect’s visual field as a blurry honeycomb of tiny images. It strikes me that there is more than likely a significant overlap in what each oculus sees. Would we humans be filled with the same wonder that Sue experienced were we to suddenly sprout extra eyes?
We are conditioned to assume that eyes are automatically situated on the horizontal plane. That a small difference in the vertical alignment of Sue’s eyes prevented her from experiencing the world as I do completely blew my mind. Under other circumstances I might go off on society’s “normalization” of stereoscopic vision—who’s to say that our way is the right way?— but the fact that alternatives become physically and mentally taxing over time proves my zeal misplaced.
Sacks’ childhood experiments with hyperstereoscopes and pseudoscopes prompted a frantic web search for examples of their effects and an irrepressible urge to build my own from paper towel rolls. It seems that hyper-stereo 3D, where the two perspectives (or eyes) converge at a sizable angle, has become a go-to format for video game designers looking to push boundaries. I’m less likely to emulate his other experience with stereoscopic deprivation, but the fact that one’s entire perceptual framework can shift based on the size of a room confirms that the brain is more responsible for our visual experience than our eyes.
Even after hearing Sue’s account I have a hard time grasping how one could function only using one eye at a time, especially with nearby objects. When I hold my phone right in front of my face I get completely different images from my right and left eyes. The effect of opening one after the other is almost jarring. Would Sue subconsciously favor one eye over the other in all close-up situations to avoid this effect? What if, in a deliberate attempt to trip up her visual stimuli, Sue rapidly alternated the eye she was using to focus? Like most of Sacks’ work, this story leaves me wishing I was able to meet and interact directly with his subject.
Side Note: I know that I, and many of my friends have a hard time working through “Magic Eye” illusions. I was surprised that such a frustrating game is used as proof of stereoscopic sight. Perhaps I’m just jealous.
Sue and Virgil integrating new sight
I was also curious about Sue's nearly seamless integration of stereoscopy into her other visual percepts, and agreed with Sack's (especially after reading about Virgil) that while this shift may have been easy for Sue, it is not an experience that can be mapped on to the vision changes of others. I wonder if it is possible that Sue had an easier experience because she simply had to fuse two separate visual fields in order to correct her vision, while sight for Virgil was an entirely unknown experience. I wonder how much of this has to do with the fact that Virgil had to learn object delineation, while Sue already had the ability to see object boundaries, even if it was on a primarily two-dimensional scale. It was necessary for Virgil to acquire skills in object recognition if he wanted to be able to correctly interpret visual stimuli, whereas Sue had perfect recognition capacities before the experience of stereopsis. To reiterate Sacks: Sue had a precursor; Virgil did not, and this precursor, it seems, made all the difference.
Beyond this, I also wondered whether other facets of Sue and Virgil's personalities affected the ease of their visual integration. Sacks describes Virgil as developing a kind of "psychic blindness" (as well as visual blindness) in reaction to his surgery. Sacks describes this psychic blindness as a bad side effect of a surgery gone wrong, but I wonder how intentional this psychic blindness might have been, to what extent it could have been Virgil's attempt to return to the former mental state that accompanied his former visual one. Sue, in contrast, seemed extremely adaptable to her pre- and post-stereoscopic visual states. She was not especially bothered by her lack of normal vision (as Sacks describes it), and was not even entirely aware of what was missing, whereas Virgil was aware of what was missing and tailored his life around it. Changing Sue's vision did not change her life in any profound way, whereas changing Virgil's vision removed him from his essential zone of familiarity.
This led me to consider the effects of "experimenting" with one's vision. Does one need a visual baseline in order to be positively affected by eyesight changes? What is the ideal platform of vision capacity/incapacity for experimentation?
Monday, April 2, 2012
The Observer
Sunday, April 1, 2012
Space and Naive Perception
Perspective and Personality
Wednesday, March 28, 2012
Space, Reality, and Three-dimensional Art
Furthermore, when we look at a photograph, technically the paper is two-dimensional, but it is impossible to not see any various planes of depth—impossible to not understand the three-dimensional world it represents. I never thought I would say this, but geometry is like art, at least in this way: geometry sets out to understand reality through representation. In order to solve a problem we draw lines and points—or at least representations of lines and points. In order to be truly one-dimensional, a line cannot have width or height, and a point cannot have length, width, or height (zero-dimensional). The pencil mark alone has measurable length, width, and height—arguably because we see it that way. We have evolved to see in three-dimensions, and personally it hurts my head when I try to fathom space in a two-dimensional or 4+ dimensional world. Still, geometry strives to represent reality and analyzes many of the same concepts art does. Crazy stuff.
This chapter really tied up any loose ends I had. In the middle of realizing all of this (freaking out over the possibility that nothing is “real”), I suddenly connected this chapter to something we read at the beginning of the semester (Sachs perhaps?). It was about how blind people perceive space differently—constructed through time rather than visually. I believe space is real—in that it exists because we construct it. So this is to say that if we could perceive four or five dimensions, we would see things in a completely different way. Seeing, perhaps meaning finally understanding the many unanswered how’s and why’s of our world equally as it means physically seeing. As a seeing person, space is nearly inseparable from visual experience. I say that space exists for blind people (but that they experience it differently) because I see space—because the blind live in my visual world. Why do I see space and depth? Is it because I can see color, because I can see light, because I can see brightness and contrast which gives shape to objects, because I can see various forms of these shapes…
Two-dimensional drawings that depict three-dimensional reality usually shows scenes that are real/ spatially achievable relationships. Such art simulates a “photographic” representation of nature (only one viewpoint), and it does not allow us to see the scene from different vantage points or to view objects from various sides. However, pattern can be used to alter our judgment of a geometric shape in illusionary art. It can depict a three-dimensional scene, which could not occur in reality. This creative art is created and appreciated by the best mathematicians and artists.
M. C. Escher:
Tuesday, March 27, 2012
Of Paintings and Poems
Wednesday, March 14, 2012
Sunday, March 11, 2012
Motion, emotion and empathy in esthetic experience
I am convinced by Freedberg and Gallese’s argument that the artist’s gesture or mark creates empathetic engagement for the viewer but I cannot say the same for the authors’ description of bodily engagement. There was very little evidence for this concept. What studies or experiences are they citing in connection to physically feeling the movements or intentions of figures of an image or painting? I think that we can identify with emotions expressed in a painting and at times feel empathy for the bodily sensations represented. But I am not convinced by the suggestion that my body parts will physically respond in regards to seeing something occurring to a representation of another body. I understand the studies of mirror neurons show that a response may be occurring on a neurological level, but never have I felt that physically while looking at a work of art.
The Feelings You've Felt Before
Monday, February 27, 2012
Interesting....
Arnheim says: "If a face is turned sideways, the nose will be perceived as upright in relation to the face but as tilted relative to the entire picture. The artist must see to it not only that the desired effect prevails, but also that the strength of various local frames of reference is clearly proportioned; they must either compensate one another or be subordinated to one another hierarchically. Otherwise the viewer will be confronted with a confusing crossfire" (Arnheim, pg. 101).
-Alison