A&P QUIZ 8

What layer of the eyeball contains both pigment to absorb stray light rays and muscle to control the lens? sclera fovea centralis choroid sensory layer

choroid

The transparent portion of the fibrous layer of the eye is the ________. conjunctiva cornea sclera retina choroid

cornea

Lists the order of the parts through which light passes as it enters the eye?

cornea, aqueous humor, lens, vitreous humor

Hemianopia is caused by __________. hardening of the lens inflammation of the conjunctiva damage to the visual cortex blocked drainage of the aqueous humor

damage to the visual cortex

Which area of the retina has the highest optic disc (blind spot)? optic nerve fovea centralis choroid ciliary body

fovea centralis

Simon is an 83-year-old man complaining of pain in his eyes, problems seeing things clearly, headaches, and seeing halos around lights. Simon's most likely diagnosis is __________. conjunctivitis cataracts glaucoma hemianopia

glaucoma

What flexible, crystal-like structure of the eye focuses light on the retina? iris sclera choroid optic chiasma lens

lens

What part of the retina absorbs light and prevents it from scattering inside the eye? pigmented layer vascular layer neural layer choroid photoreceptors

pigmented layer

After the age of 40 the elasticity of the lens decreases, making it difficult to clearly see close objects. What is this condition called? ophthalmia neonatorum presbyopia astigmatism myopia

presbyopia

What type of photoreceptor cell allows us to see gray tones in dim light, and provides our peripheral vision? cones ganglion cells rods bipolar cells optic disc

rods

The gel-like substance that reinforces the eyeball and prevents it from collapsing inward is the ________. vitreous humor (body) scleral venous sinus (canal of Schlemm) choroid aqueous humor ciliary body

vitreous humor (body)