Start reviewing and responding to the postings of your classmates as early in the week as possible. Respond to at least two of your classmates. Participate in the discussion by asking a question, providing a statement of clarification, providing a point of view with a rationale, challenging an aspect of the discussion, or indicating a relationship between one or more lines of reasoning in the discussion. Complete your participation for this assignment by the due date assigned.

• Consider the conceptual physics behind the visual process. Explain how the curves of the cornea and the lens relate to the angle of light wave projection. Describe some of the changes or problems in the eye structure that can cause a problem with vision. Describe some of these problems and the way they alter or block light waves. For example, cataracts obstruct light waves, thereby causing problems with vision.
• Describe the role of photoreceptors and their location in the eye. Explain the importance of locations to other cells in the retina and the influence on light waves.  
• The optic nerve produces a blind spot in our visual field. Explain how the knowledge about the blind spot and our lack of awareness teach us about the perceptual process.