MODULE 1_ LESSON 5 ASSIGNMENT.docx - MODULE 1 LESSON 5 ASSIGNMENT Table of Vision Defects and Disorders Defect or Disorder Cataracts Affected Structure

MODULE 1_ LESSON 5 ASSIGNMENT.docx - MODULE 1 LESSON 5...

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MODULE 1: LESSON 5 ASSIGNMENT Table of Vision Defects and Disorders Defect or Disorder Affected Structure of the Eye Symptoms Physiology of the Effect Technologies to Detect or Treat Cataracts Lens Opaque lens Grey and white spots As the lens age, its protein structure can start to degenerate, making it opaque and preventing light from passing through it. This disorder can be detected by observing the lenses of the subject. If the subject has been affected by this disorder, it will be obvious as his or her lenses would appear lighter than that of a normal person's. The lens can sometimes be surgically replaced. Myopia (nearsighted- ness) Retina / Eyeball Difficulty seeing objects that are far away, but no problem with seeing near objects The eyeballs of people with myopia are elongated, so the focussed light falls in front of the retina instead of on the photoreceptors. Nearsighted people can wear concave lenses, which diverge incoming light rays so that the image falls directly on the retina. Another way
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