Anatomy Flashcards
Inner layer of the eyelid is called the … and is a thin, transparent mucous membrane
Conjunctiva
The upper lid will cover 1-2mm of the …
superior cornea
Pre-corneal tear film refractive index
1.3375
Pre-corneal tear film is the main supplier of oxygen to the cornea and inhibits the growth of …
microcysts
Pre-corneal tear film creates a smooth optical surface and wets the cornea and prevents epithelial damage
true
Pathway of tears
…
puncta
lacrimal canaliculi
lacrimal sac
nasolacrimal duct
nose
Lacrimal glands
Pathway of tears
Lacrimal glands
…
lacrimal canaliculi
lacrimal sac
nasolacrimal duct
nose
Puncta
Pathway of tears
Lacrimal glands
puncta
…
lacrimal sac
nasolacrimal duct
nose
lacrimal canaliculi
Pathway of tears
Lacrimal glands
puncta
lacrimal canaliculi
…
nasolacrimal duct
nose
lacrimal sac
Pathway of tears
Lacrimal glands
puncta
lacrimal canaliculi
lacrimal sac
…
nose
Nasolacrimal duct
3 tunics of the eye
Outer layer= …
middle layer= choroid
inner layer= retina
sclera
3 tunics of the eye
Outer layer= sclera
middle layer= …
inner layer= retina
Choroid
3 tunics of the eye
Outer layer= sclera
middle layer= Choroid
inner layer= …
Retina
layers of sclera
outside layer - …
lamina fusca
stroma
inner layer - endothelium
Episclera
layers of sclera
outside layer - episclera
…
stroma
inner layer - endothelium
lamina fusca
layers of sclera
outside layer - episclera
lamina fusca
…
inner layer - endothelium
Stroma
layers of sclera
outside layer - episclera
lamina fusca
stroma
inner layer-…
endothelium
Outermost tunic made up of of Fibrous connective tissue
Sclera
Composed of blood vessels and lies between the sclera and retina. It provides blood supply for the outer cells of the retina. Regulates the temperature
Choroid
Innermost layer of the eye
Visual pathway to the brain
Converts light entering the eye via nerve impulses
Retina
Photoreceptors of the retina. Night vision, no color vision found in periphery
Rods
Photoreceptors of the retina. Day vision, color vision. Ice cream in the sun
Cones
Transparent avascular tissue 40-44.00D
The cornea
Refractive index of cornea
1.376
Forms part of the first tunic of the eye, elliptical in shape and most of the time is slightly toric
Cornea
The steepest part of the cornea is called … and can not be centrally located
Corneal Apex
Central area of cornea is called the
Corneal cap
The state of relative dehydration maintained by the normal intact cornea tha enables the cornea to remain transparent
Desturgescence
Corneal oxygenation helps get …% of oxygen to the cornea
21
During sleep corneal oxygenation is reduced to …% but it can function with as little as 3-4%
7-8
3 chambers of the eye
Anterior, posterior and vitreous
Contains aqueous humor, trabeculer meshwork (provides an exit for aqueous humor) and canal of schlemm
Anterior chamber
After aqueous flows through the trabecular meshwork, excess aqueous flows in to the …
Canal of schlemm
Behind the iris and bounded by the posterior iris surface the lens the anterior vitreous and
the ciliary body
Involved in
production and
circulation of
aqueous humor
Posterior chamber
Flow of aqueous humor
Produced by ciliary body
flows through the pupil to enter the anterior
nourishes the cornea and the lens and gives the eye its shape
Maintains intraocular pressure
Repeat
Flow of aqueous humor
…
flows through the pupil to enter the anterior
nourishes the cornea and the lens and gives the eye its shape
Maintains intraocular pressure
Repeat
Produced by ciliary body
Flow of aqueous humor
Produced by ciliary body
…
nourishes the cornea and the lens and gives the eye its shape
Maintains intraocular pressure
Repeat
flows through the pupil to enter the anterior
Flow of aqueous humor
Produced by ciliary body
flows through the pupil to enter the anterior
…
Maintains intraocular pressure
Repeat
nourishes the cornea and the lens and gives the eye its shape
Flow of aqueous humor
Produced by ciliary body
flows through the pupil to enter the anterior
nourishes the cornea and the lens and gives the eye its shape
…
Repeat
Maintains intraocular pressure
thick gel like fluid that helps eye keep its shape
Vitreous
1 of 2 muscles of the iris that constricts
Sphincter
1 of 2 muscles of the iris that dilates
Dilator
sebaceous gland of eyelid, along edge of eyelids where eyelashes are. secretes oils and lipids in tarsal plates
Meibomian glands
Located around cilia and follicles of eyelashes
Secretes oil and lipids
Gland of zeis
Located near cilia
Secrete sweat
Gland of moll
