Optician Exam Questions and Answers
three layers of the eye
fibrous tunic- sclera and cornea
vascular tunic- iris choroid and cilliary body (responsible for nourishment)
Nervous tunic- inner layer of photoreceptors and neurons which consists of the retina
rods vs cones
rods are for dim ...
Optician Exam Questions and Answers
three layers of the eye - answer fibrous tunic- sclera and cornea
vascular tunic- iris choroid and cilliary body (responsible for nourishment)
Nervous tunic- inner layer of photoreceptors and neurons which consists of the retina
rods vs cones - answer rods are for dim light
cones are for colors
macula has mainly (rods or cones) - answer cones
place in eye with highest conc of cones - answer fovea
place where optic nerve enters the eye - answer optic disc (blind spot)
the three fluid filled chambers - answer anterior chamber (between cornea and iris
posterior chamber between iris and lens
vitreous chamber between retina and lens and is filled with a thicker gel-like substance
called vitreous humor maintains shape of eye
aqueous humor - answer watery fluid produced by the ciliary body maintains
pressure
5 layers of cornea - answer outer most is epithelium
bowmans membrane
stroma(thickest part)
descemets membrane (seperates stroma and endothelium
endothelium removes water from cornea helps to keep cornea clear
amount of light allowed thru the pupil is controlled by the - answer iris
the 2 muscles of the iris - answer dilator muscle opens and allows more light in
sphincter muscle which closes the iris
iris can change from ___ to ___ - answer 2 mm to 8mm
crystalline lens - answer focuses light on the retina
the process of focusing the objects based on distance - answer accommodation
the closer an object is to the eye the more - answer power is required of the
crystalline lens to focus the image on the lens
ciliarry body is attached to lens via fibrous strands called - answer zonules
,when ciliary body contracts the - answer zonules relax allowing lens to thicken and
add power allowing the eye to focus up close
when the cilliary body relaxes - answer the zonules contract drawing lens outward
making lens thinner and allowing eye to focus at distance
another term for eyelid - answer palpebrae
point where upper and lower eyelids meet near the nose (inner corner of eye) - answer
medial canthus
point where upper and lower lids meat towards ear - answer lateral canthus
strong hairs that run along upper and lower palperbral margins - answer eyelashes
located along inner margin of eyelids, secrete a liquid that keeps eyelids from sticking -
answer meibomian glands
actual location is behind eyelid or palpebra and along sclera it is where two layers of
conjuctiva meet and join - answer fornix (pink thing in inner corner
inside orbit of eye, gland that produces bulk of the tears is located above lateral canthus
in a depression in the bone that surrouds eye - answer lacrimal gland
small openings located at themedial canthus that allow the accumulation of tears to
drain off of the eye, drain thru nosal cavity - answer lacrimal puncta
path that tears take from the eye to the lacrimal sac and then nasal passage - answer
lacrimal canals
located at the medial canthus, also produces a liquid that sooths and lubricates the eye
- answer Lacrimal Puncta
the clear lens or structure that covers the iris or colored part of the eye the cornea is first
major structure that refracts light as it enters the eye. it has no blood supply and gets all
of its oxygen directly from the air - answer cornea
opening created by the iris changing size - answer pupil
whitnes of eyes, sclera is thick, tough and fibrous layer that provides the structure of teh
entire eyeball - answer sclera
where the cornea blends into sclera - answer limbus
,the colored area under the cornea that opens and closes to regulate light entering the
eye - answer iris
the layer that covers the eyelids - answer palpebral conjunctiva
the layer that covers the exposed portions of the eye - answer ocular bulbar
conjunctiva
palpebrae - answer
medial canthus - answer
lateral canthus - answer
eyelashes - answer
meibomian glands - answer
fornix eye - answer inner pink part
lacrimal gland - answer
lacrimal puncta - answer
cornea - answer
pupil - answer
limbus - answer
palpebral conjunctiva - answer
ocular conjunctiva - answer
rotates eye laterally or out towards the ear attaches directly to the side of the eye and
runs straight back - answer lateral rectus
eye looks up, attaches directly to the top of the eye and runs straight back - answer
superior rectus
rotates eye medially or in towards the nose, attaches directly to the side of the eye and
runs straight back - answer medial rectus
eye looks down attaches directly to bottom of the eye and runs straight back - answer
inferior rectus
, eye rolls looks up and to the side attaches along the lateral side of eye and runs under
the eye passing over inferior rectus and attaches medially - answer inferior oblique
eye rolls, looks down and to the side.. attaches under the superior rectus passes thru
the bony spur known as trochlea and then follows the path of the superior rectus -
answer superior obleque
lateral rectus eye - answer
superior rectus eye - answer
medial rectus eye - answer
inferior rectus eye - answer
inferior oblique eye - answer
superior oblique eye - answer
emmetropic eye - answer all rays of light entering eye all focus on the retina where
they need to be to provide crisp sight without need of corrective lenses
presbyopia - answer unable to read fine print, when crystalline lens can no longer
change shape and provide accommodation
unable to read fine print, when crystalline lens can no longer change shape and provide
accommodation - answer Presbyopia
simple myopia - answer simple cuz all rays of light entering the eye focus at same
spot, wrong spot but still same place
able to see up close but not far away
simple cuz all rays of light entering the eye focus at same spot, wrong spot but still
same place
able to see up close but not far away - answer myopia
simple hyperopia - answer the rays of light entering focus at same spot, but wrong
spot. focus behind the retina and people with this can see distance but not fine print
the rays of light entering focus at same spot, but wrong spot. focus behind the retina
and people with this can see distance but not fine print - answer simple hypperopia
simple myopic astigmatism - answer some rays fall short of intended spot on retina
but some fall directly on fovea. can be corrected with toric lenses. one part of glasses
witll have now correction and other will have power for rays that need to be redirected
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