Orbit

Front 1

hordeolum (sty)

Back 1

infection of the sebaceous gland

Front 2

chalazia

Back 2

cyst or obstruction in tarsal gland duct

Front 3

what passes thru superior orbital fissure?

Back 3

CN 3, 4, V1, 6, superior ophthalmic vein

Front 4

central artery of retina

Back 4

end artery

Front 5

ophthalmic veins

Back 5

have no valves,
so bacterial infections in blood can easily flow to cavernous sinus or pterygoid plexus (lots of anastomoses but no valves)

Front 6

thrombophlebitis

Back 6

inflammation of a vein with formation of a thrombus (clot)

Front 7

aqueous humor

Back 7

in anterior chamber, produced by ciliary bodies, results in glucoma if abnormality in uptake mechanism

Front 8

glaucoma

Back 8

when drainage of aqueous humor thru scleral venous sinus decreases, pressure builds up in anterior and posterior chambers of eye, fluid no where to go except backwards and this pressure kills neuornal cells of retina, blindness

Front 9

vitreous humor

Back 9

gel substance occupies postremal chamber does not turnover (disappers and reappear), once you get coagulated protein flowing around, it will be there forever

Front 10

papillodema

Back 10

increased intercranial pressure, eye sticks out

Front 11

detachment of retina

Back 11

layers of retina separated in embryo by an intraretinal space (disappears in dev). pigment layer firmly attaches to choroid but not to neural layer so blow to eye can recreate intraretinal space and cause flashes of light going on and off

Front 12

horner syndrome

Back 12

interruption of a cervical sympathetic trunk results in paralysis of superior tarsal muscle causing drooping of upper eyelid, so pupils constricted, redness and dryness of eye, increased temp of face,etc

Front 13

scleral venous sinus

Back 13

a vascular structure encircling the anterior chamber of the eye thru which the aqueous humor is returned to the blood circulation

Front 14

lacrimal fluid

Back 14

production of which is stimulated by parasymptatheic impulses from CN 7