Question

1. Explain the cause of blindness with cataract, acute glaucoma, detached retina, and damage to the optic chiasm.

2. Explain why a cochlear implant may not be successful in older children who are deaf.

3. Explain why Meniere’s syndrome causes both hearing loss and vertigo.

4. Describe several coping mechanisms that can be used in dealing with psychological stressors.

5. Define the terms tolerance and physiologic dependence.

Answer 1

Question no 1

Cause of blindness in catract due to the thickening and cloudiness of the lens

It is caused by the Increase in replacement of soluble protein with insoluble protein

Cause of blindness in acute glaucoma

This cause a sudden increase in the intra capsular pressure and lack of pain . This when cause compression of the optic nerve and when prolonged will cause degeneration if optic nerve causing permanent blindness

Cause of blindness in detached retina

When detachment of retina occur from the eye due to etiological factors for a prolonged period when untreated it cause the inability of eyes to perceive image . This cause blindness

Cause of blindness in optic chiasma damage

When due to etiological factors damage to optic chiasm occur it will lead to pressure over the nerves or reduced blood supply to it . As they are the conditions system the ability to interpret image is destroyed causing blindness