human eye and ear

Question 1

what is binocular vision

Answer 1

Is the use of 2 eyes with overlapping fields of view that make one large field of view.

Question 2

Short-sightedness (myopia)

Answer 2

Objects nearby are seen clearly
– distant objects are out of focus

Caused by abnormal curvature
of cornea/elongated eyeball
-corrected by concave lens

Question 3

what is the reaction of the pupil to low light intensity

Answer 3

-circular muscles relax
-pupil dilates allowing more light to enter the eye
-

Question 4

Long-sightedness (hypermetropia)

Answer 4

Distant objects can be seen clearly
Nearby objects are out of focus
Caused by a shorter eyeball/abnormally flat cornea
-corrected by convex lens

Question 5

Astigmatism

Answer 5

Curve of the lens is not uniform (even)
-Results in incoming light rays to be
refracted in 2 ways (multiple focal points)
Creates an unclear, blurred image

Question 6

Cataracts

Answer 6

Clouding of the eye’s clear, transparent lens
Prevents light reaching the retina – causes blurred vision
Proteins in lens clump together – causes the clouding (develops slowly over time)

Question 7

what are the two types of deafness and what device helps with deafness

Answer 7

• congeital and adventitious

- hearing aid

Question 8

what is a cochlear implant

Answer 8

• helps profoundly deaf people

- functions as organ of corti

Question 9

what is otitis media and how is it treated

Answer 9

• middle ear infection
• excess fluid in the ear because pus does not drain out
• grommet which helps with drainage