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Terms in this set (78)
COMPONENTS OF THE EYE
1. bulbous oculi (eyeball) within orbit ( frontal bone, zygomatic bone, lacrimal and ethmoid bone)
2. eye structures: orbit, lids, conjuctiva and lacrimal apparatus
3. optic nerve
4. ophthalmic artery
2. eye structures: orbit, lids, conjuctiva and lacrimal apparatus
3. optic nerve
4. ophthalmic artery
LAYERS OF THE EYE
1. 3 Layers :
outer - tunica fibrosa
middle- tunica vasculosa with choroid, ciliary body, and iris
inner layer- tunica interna with the retina and the retinal pigment epithelium
outer - tunica fibrosa
middle- tunica vasculosa with choroid, ciliary body, and iris
inner layer- tunica interna with the retina and the retinal pigment epithelium
OPTIC MEDIA
The cornea, aqueous humor, lens, and vitreous body constitute the
optic media of the eye.
optic media of the eye.
how we see
1) Light passes through the cornea
2) then it is sent through the pupil
3) the colored part is called the iris
4) behind the iris is the retina: light-sensitive tissue lining
2) then it is sent through the pupil
3) the colored part is called the iris
4) behind the iris is the retina: light-sensitive tissue lining
what's Sclera
1. outermost layer of eye. fibrous layer that forms white of the eye.
2. maintains shape and gives attachment to the extraocular muscles.
3. becomes thin at back where optic nerve goes through-> Lamina cribrosa
2. maintains shape and gives attachment to the extraocular muscles.
3. becomes thin at back where optic nerve goes through-> Lamina cribrosa
Pupil
The pupil is an opening that allows light to enter the eye.
Cornea
A transparent gelatinous structure in front of Iris which allows light in.it is nourished by the aqueous humour
IRIS
1. coloured, free, circular diaphragm with an aperture in the centre—the pupil.
2. divides anterior and posterior chambers
3. part of the choroid
2. divides anterior and posterior chambers
3. part of the choroid
CHOROID
1. middle vascular layer of the eye - between retina and sclera
ciliary body
1. part of choroid
2. attaches to iris
3. constits of muscle fibres, stroma, secretory cells
2. attaches to iris
3. constits of muscle fibres, stroma, secretory cells
RETINA
1. contains 10 layers of nerve cells and nerve fibres lying on pigmnented epithelial layer.
2.
2.
The anterior chamber.
The space beteen lens & cornea filled with the aqueous humour
Posterior chamber
• Between lens & Iris.
Canal of schelm
A canal at junction of cornea and iris through which aqueous humour flows
Vitreous humour
The middle of eye ,
jelly-like Vitreous humor makes up 80% of eye and keeps eyeballs spherical .
need constant replacement + has phagocytes which breakdown and remove obstacles/ floaters.
jelly-like Vitreous humor makes up 80% of eye and keeps eyeballs spherical .
need constant replacement + has phagocytes which breakdown and remove obstacles/ floaters.
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