Medical Quiz

Eye Physiology Quiz


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In order to see clearly, light rays must be bent to hit the ______ of the retina.

A. blind spot

B. optic disk

C. fovea centralis

D. focal point


Sensory neurons in the retina send ____________ which are routed to the visual cortex in the occipital lobe of the brain.

A. action potentials

B. blind spots

C. light waves

D. accomodations


When you are looking at something up close, this reflex occurs to reduce the amount of light entering eye.

A. blind spot

B. Accommodation

C. pupil constriction

D. somatic reflex arc


neurons that synapse with the photoreceptors and the ganglion neurons

A. cones

B. rods

C. bipolar neurons

D. rhodopsin


Type of photoreceptor that functions in low light and creates shades of gray

A. retina

B. rod

C. cone

D. choroid


The lens is naturally ______, clear and elastic.

A. oval

B. flat

C. round

D. concave


It’s a change to the lens that causes it to stiffen and also discolor the lens of the eye. It causes blurring of up close vision that impedes ability to read printed material or text on a screen. This is often related to aging.

A. Myopia

B. Presbyopia

C. Hyperopia

D. Astigmatism


Which of the following is the correct order of the structures through which light passes after entering the eye?

A. Lens, pupil, cornea, retina

B. Pupil, cornea, lens, retina

C. Cornea, retina, pupil, lens

D. Cornea, pupil, lens, retina


How many types of cones do you have?

A. 2

B. 3

C. 4

D. 5


It lets light enter the eye

A. iris

B. retina

C. pupil


When light hits the retina, the _________ are stimulated.

A. sclera

B. optic disk

C. photoreceptors

D. choroid coat


Contains the visual and auditory reflex centers.

A. Midbrain

B. Pons

C. Medulla Oblongata

D. Reticular formation


When the brain detects that the tension in the eye muscles is changing as the eyes rotate inwards

A. convergence

B. Monocular depth cue

C. accommodation

D. retinal disparity


All of the horizontal light rays that enter the eye converge at the _____

A. lens

B. focal point

C. optic disk

D. vitreous humor


Where does the optic nerve take the visual information?

A. To the Thalamus and then to the Occipital Lobe

B. to the Hippocampus and then to the Occipital Lobe

C. to the Hypothalamus and then to the Occipital Lobe

D. to the Cerebellum and then to the Occipital Lobe


When the eyeball is too short, causing Farsightedness

A. Hyperopia

B. Myopia

C. Glaucoma

D. Astigmatism


The fovea contains which types of photoreceptors?

A. Rods

B. Cones


When the eyeball is too long causing Nearsightedness

A. Myopia

B. Hyperopia

C. Asigmatism

D. Presbyopia


What part of the eye has the highest concentration of rods and cones?

A. optic nerve

B. fovea centralis

C. optic disk

D. iris


If an object moves closer than the far point of vision, which is NOT one of the three reflexes that must occur to bring the image to proper focus?

A. Accommodation of the lens

B. Relaxing ciliary muscles

C. convergence of the eyes

D. constriction of the pupil


Eye strain is caused by

A. extended time for ciliary muscles to stay contracted

B. lens staying flat for too long

C. looking at something far away

D. blurry vision


Write the correct pathway of for the sensory message to be sent to the brain?

A. retinal ganglion, bipolar cells, cones or rods, optic nerve

B. cones or rods, bipolar cells, ganglion cells, optic nerve

C. bipolar cells, cones or rods, retinal ganglion, optic nerve

D. bipolar cells, ganglion cells, cones or rods, optic nerve


Light waves are bent first by the ______.

A. cornea

B. aqueous humor

C. lens

D. vitreous humor




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