Special Senses:Vision

Question 1

The light bending power of the cornea, lens or vitreous humor is called its..

Answer 1

Refractive Index

Question 2

The general name of the involuntary muscles that are responsible for changes in both the lens curvature pupillary size is called?

Answer 2

Intrinsic (internal) muscles

Question 3

Closer in children and young adults and farther with old age, what is the name of the closest distance an object can be focused on clearly?

Answer 3

Near Point of Accommodation.

Question 4

Fibers from which eye is found in the left optic nerve?

Answer 4

Left optic nerve: Fibers from the left eye.

Question 5

Fibers from which eye is found in the left optic tract?

Answer 5

Left optic tract: Medial fibers from the right eye, and lateral fibers from the left eye.

Question 6

Fibers from which eye is found in the optic chiasm?

Answer 6

Optic chiasm: Medial fibers from the left and right eyes.

Question 7

Fibers from which eye is found in the right optic nerve?

Answer 7

Right optic nerve: Fibers from the right eye.

Question 8

Fibers from which eye is found in the right optic tract?

Answer 8

Right optic tract: Medial fibers from the left eye, and lateral fibers from the right eye.

Question 9

Name one constituent of the lacrimal apparatus

Answer 9

Lacrimal apparatus: Lacrimal glands/ lacrimal canaliculi/ lacrimal sac/ nasolacrimal duct.

Question 10

Name one of the two groups of muscles responsible for eye relexes.

Answer 10

Eye reflexes: Intrinsic/ Extrinsic muscles.

Question 11

Name one of the non-depolorizing supporting cells found in the retina.

Answer 11

Horizontal cells/ Amacrine cells.

Question 12

Optic tract fibers will synapse with what part of the brain?

Answer 12

Lateral Geniculate body of the thalamus.

Question 13

What chart is used to measure visual acuity?

Answer 13

The Snellen chart.

Question 14

What is the Convex/Converging Lens used for?

Answer 14

It is used to correct the hyperopic/farsighted eye.

Question 15

What is the Concave/Diverging Lens used for?

Answer 15

It is used to correct the myopic/nearsighted eye.

Question 16

Which is the part of the eye that is examined when using the opthalmascope?

Answer 16

Fundus/ Retina/ Eyeball interior.

Question 17

The chart which was used in the Lab to show irregularities in curvature of the lens/ cornea is called

Answer 17

The Astigmatism Chart.

Question 18

Where do the fibers/axons from the lateral geniculate nucleus branch into?

Answer 18

The optic radiation.

Question 19

The ability of the eye to focus differently for objects of near vision & 6m (20ft), is called?

Answer 19

Accommodation.

Question 20

The branched optic radiations will terminate in which region of the brain?

Answer 20

Visual Cortex

Question 21

The Snellen chart was used to test what?

Answer 21

Visual Acuity

Question 22

What do extrinsic muscles allow the eye to do?

Answer 22

Follow a moving object/ Allow for eyeball movement

Question 23

What do the lacrimal glands produce?

Answer 23

Produce tears

Question 24

What do the tarsal glands produce?

Answer 24

Produces an oily substance

Question 25

What is the bending of light upon passing from one substance to another called?

Answer 25

Refraction

Question 26

What is the function of the ciliary glands?

Answer 26

They help lubricate the eyeball

Question 27

What is the function of the lacrimal sac?

Answer 27

Fills with & stores tears/ Allows flow of tears

Question 28

What is the function of the scleral venous sinus?

Answer 28

Reabsorption of the Aqueous humor

Question 29

What is the medial rotation of the eyes called?

Answer 29

Convergence

Question 30

What is the name of the book of color blindness plates?

Answer 30

Ishihara Color Plates

Question 31

In the accommodation pupillary reflex test done in the lab, what was the reaction of looking and focusing at a distant object and then focusing at a very close object by the pupils?

Answer 31

Accommodation pupil reflex: Pupil dilation followed by pupil constriction

Question 32

In the convergence reflex test done in the lab, what was the reaction of looking and focusing at a distant object and then focusing at a very close object by the eyes?

Answer 32

Convergence reflex: Regular eye movement and then medial