Question

15-2 b. Describe the characteristic signs of cataract development. c. Compare the wide-angle and narrow-angle glaucoma, including the pathophysiology and signs of each. e. Describe the two types of macular degeneration. 15-3 c. Describe the location of the auditory nerve receptors and trace the connection to the brain. d. Predict the effect on hearing capacity of damage to: (1) the cochlea in the right ear; (2) the left auditory nerve; (3) the left temporal lobe.

Answer 1

15-2 b.characteristic signs of cataract development

Dim, blurred and cloudy vision

Inability to read or do activities in normal light

Changes in eyeglasses and contact lens more often

light sensitivity and sensitivity to glare

double vision in an eye

impairment in vision during night time

nimbus seen around the lights

color fading

e. Two types of macular degeneration

Dry

Wet

Dry:

It is the atrophic type which has slow progress compared to wet type and affects more than 80% of people and has no approved treatment of care for cure yet.

It causes small whitish or yellowish deposit on retina beneath the macula causing degeneration over time

Wet:

It affects only 10-15% of people with 85-90% loss of vision. In this type an abnormal blodd vessel grow in retina towards the macula which results in bleeding, breaking and leakage of fluids causing damage to macula. they progress more rapidly , resulting in central loss of vision.