Vision 1

Question 1

……………… occurs at the junction between two media and is responsible for bending of light

Answer 1

Refraction

Question 2

Name and describe the three contributing factors of:

The capacity of the eye to change focus on far or close objects

Answer 2

Accomodation
Lens changes shape
Pupils constrict
Eyes converge

Question 3

Lens thickness is controlled by:

Answer 3

Ciliary muscles and their suspensory ligaments

Question 4

Pupil constriction and dilation is controlled by which muscles?

Answer 4

Pupillary contrictor

Pupillary dilator

Question 5

Eye convergence is controlled via which muscles?

Answer 5

Medial rectus muscles

Question 6

In (a)…………image forms short of retina, can cause (b)………. squint and is corrected with (c)……………… lenses

Answer 6

(a) Myopia
(b) Divergent
(c) Biconcave

Question 7

In (a)…………image forms behind retina, can cause (b)………. squint and is corrected with (c)……………… lenses

Answer 7

(a) Hyperopia
(b) Convergent
(c) Biconvex

Question 8

In (a)…………multiple images are formed on retina (b)……………… lenses

Answer 8

(a) astigmatism

(b) Cylindrical

Question 9

In (a)………. aging causes lens to become less mobile/elastic. This means when ciliary muscle contracts the lens does not change shape as much. Corrected with (b)………… lenses

Answer 9

(a) Presbyopia

(b) Biconvex

Question 10

Conversion of light waves into an action potential is called

Answer 10

Phototransduction