Cortical visual processing in axial myopia essay

Stage 2 These basic components are then grouped on the basis of similarity, providing information on distinct edges to the visual form. Subsequently, figure-ground segregation is able to take place. Stage 3 The visual representation is matched with structural descriptions in memory. Stage 4 Semantic attributes are applied to the visual representation, providing meaning, and thereby recognition.

Cortical visual processing in axial myopia essay

This is relevant considering that there is a huge controversy about myopia pathogenesis which has a significant social and clinical impact. According to the author suggestion about the role of the light in myopia development it seems also relevant that another important ambiental factor in the development of myopia is the low or altered green cones stimulation.

This is strongly supported by the clinical features of several cone dysfunctions as Blue Cone Monochromatism BCMincomplete achromatopsia and Bornholm disease all of which are significantly associated with myopia [1].

In contrast complete achromatopsia shows a hyperopic pattern of distribution. This was fundamental in human evolution [2] to adapt the vision to a green ambient in forests as a defence against predators. In such environment myopia would have been a life-threatening factor.

In addition people who read is naturally less exposed to green; in a well-known optometric test red—green balancing myopic patients can read better if the background is red, showing some difficulty with a green background.

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In conclusion these clinical observations suggest that the misregulation of physiological mechanisms of green signal processing may contribute to eye elongation and thus to myopia. According to the author, we think that future research may extends the analysis to the broader spectrum of light radiation taking into account UVR as well as green and perhaps red and blue wavelengths.The brain controls all aspects of our functioning, from the moment we were conceived until the last of our breath.

Much of what we do is not a result of just one action or function of the brain but a series of simultaneous processes that all work at the same time to be able to accomplish a task. Pierpaolo Maimone studies Ophthalmology, Music, and Computer Music. In conclusion these clinical observations suggest that the misregulation of physiological mechanisms of green signal processing may contribute to eye elongation and thus to myopia.

Cortical visual processing in axial myopia essay

1 out of 6 had a decreased visual acuity (cortical visual impairment), 3 out of 6 had. One example of cortical magnification is the relatively large area of visual cortex that is activated by stimulation of the fovea.

An example in the somatosensory system is the large area of somatosensory cortex activated by stimulation of the lips and fingers. Physiologic myopia may include refractive myopia (the cornea and lens-bending properties are too strong) and axial myopia (the eyeball is too long).

Pathologic myopia is a far less common abnormality. The development of spatial vision and binocular fusion High axial myopia of −11 to −15 D following buckling surgery in infants with retinopathy of prematurity (ROP) is more difficult to treat.

Evidence from lesion studies and neuroimaging studies confirms the existence in humans, as in macaques, of two visual processing pathways.

Name the central processing visual system structures and characterize how M and P pathways utilize separate projection routes and Describe the concepts of binocularity and ocular dominance as they apply to neurons in visual cortex.

Identify the cortical areas and.

Cortical visual processing in axial myopia essay
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