Eye Quiz

Question 1

Lacrimal fluid also known as?

Answer 1

tears

Question 2

Why do you have a blind spot?

Answer 2

no photoreceptors there, optic nerve is present

Question 3

Which part of the eye do albinos have trouble with due to light scattering?

Answer 3

iris

Question 4

White part of the eye?

Answer 4

sclera

Question 5

Pink eye is an infection of which layer?

Answer 5

conjunctiva

Question 6

Optic Pathway

Answer 6

optic nerve, optic chiasma, optic tracts, thalamus/optic radiation, occipital lobe

Question 7

3 Tunics of the eye

first

Answer 7

1.) Fibrous tunic (outer)
very fibrous & tough
2 major parts:

• sclera(white connective tissue)
• cornea(transparent central anterior portion) allows light to pass through, repairs itself easily, immune to rejection bc immune system is out (avascular)

Question 8

3 Tunics of the eye

second

Answer 8

2.) Choroid layer (middle)
blood rich
dark in color (pigment), prevents light scattering
3 modified structures:

• ciliary body(smooth muscle) controls iris and lens
• iris(colored part of eye) albinos lack pigment => troubled vision in bright light
• pupil(rounded opening in the iris)

Question 9

3 Tunics of the eye

last/third

Answer 9

3.) Sensory Tunic (retina)
2 photoreceptors: rods & cones (breaking down light)

• rods(most are found on the edges of the retina) allows for peripheral vision, dim light vision, perception is in all gray tones
• cones(allow for colored/detailed vision) densest at the center of retina, fovea centralis=only cones

Question 10

Trail of Tears

Answer 10

lacrimal gland, excretory duct of lacrimal gland, lacrimal canals, lacrimal sac, nasolacrimal duct, nasal cavity