Senses: Eye Flashcards
Light is detected by:
photoreceptors.
Name the difference spectrums of light:
Gamma rays X rays UV light visible light infared microwaves radio waves
Visible light ranges from (nm):
380nm to around 750nm.
What makes up color? Name the low and the high energy ends.
different wave lengths with in the visible light spectrum. (low - ROYGBIV - high). red has a longer wavelength
Opening in face that your eye is behind:
palpebral fissure
points of eye openings:
lateral and medial commissures
White of the eye:
sclera
pigmented part of eye:
iris
Eyelid is lined with a mucus membrane called the
conjunctiva
The photoreceptors on the retina are high dependent on:
blood flow from the vascular layer. for its nutrients and oxygen and so fourth.
Lacrimal apparatis:
tear glands
Tears get romoved by:
draining into the lacrimal canal which drains to the lacrimal sac, which dtrain through the nasolacrimal duct, which drains into the nasal cavity.
Eyes are controlled to muscles attached to the outside:
extrinsic muscles
We have 3 different cranial nerves controlling the different eye muscles.
trochlear nerve, abducens nerve, oculomotor nerve.
There are _ rectus muslces:
4 (rectus means straight). One on each of the 4 poles. superior, inferior, lateral, medial
there are _ oblique muscles.
- superior and inferior. They loop through a ring on the side and they twist your eyes.
Muscles inside the eye do two things:
opening of the pupil (iris) and control the thickness of the lens (ciliary body).
Define conjunctiva:
a transparent mucous membrane that lines the eyelids and covers anterior surface of eyeball except cornea.
a transparent mucous membrane that lines the eyelids and covers anterior surface of eyeball except cornea.
conjunctiva
What are the tunics?
the 3 layers that from the wall of the eye
Tunica fibrosa:
sclera and cornea (white, clear)
Tunica vasculosa:
choroid, ciliary body & iris (brown, pink)
Tunica interna:
retina (yellow)
space behind the cornea
anterior compartment