Shared Flashcard Set

Details

Chapter 8 Group 4
46-60
15
Anatomy
11th Grade
01/09/2012

Additional Anatomy Flashcards

 


 

Cards

Term
BIPOLAR CELLS
Definition
CELLS THAT ARE PART OF THE RETINA THAT EXSIST BETWEEN THE PHOTORECEPTORS (RODS AND CONES) AND THE GANGLION CELLS. THEY ACT INDIRECTLY OR DIRECLTY TO TRANSMIT SIGNALS FROM THE PHOTORECEPTORS TO THE GANGLION CELLS.
Term
GANGLION CELLS
Definition

A RETINAL GANGLION CELL(RGC) IS A TYPE OF NEURON OF THE RETINA.

 

Term
OPTIC NERVE
Definition
ALSO CALLED THE CRANIAL NERVE 2, TRANSMITS VISUAL INFORMATION FROM THE RETINA TO THE BRAIN.
Term
OPTIC DISC/BLIND SPOT
Definition

THE OPTIC DISC OR OPTIC NERVE HEAD IS THE LOCATION WHERE GANGLION CELL AXONS EXIT THE EYE TO FORM THE OPTIC NERVE. THERE ARE NO LIGHT SENSITIVE RODS OR CONES TO RESPOND TO A LIGHT STIMULUS AT THIS POINT. THIS CAUSES A BREAK IN THE VISUAL  FIELD CALLED :THE BLIND SPOT". THE OPTIC DISC REPRESENTS THE BEGINNING OF THE OPTIC NERVE. (THE SECOND CRANIAL  NERVE) AND IS THE POINT WHERE THE AXONS OF RETINAL GANGLION CELLS COME TOGETHER. THE OPTIC DISC IS ALSO THE ENTRY POINT FOR THE MAJOR BLOOD VESSELS THAT SUPPLY THE RETINA.

Term
LENS
Definition
FOCUSES LIGHT ENTERING THE EYE ON THE RETINA
Term
CILIARY ZONULE
Definition
A SERIES OF FIBERS CONNECTING THE CILIARY BODY AND LENS OF THE EYE.
Term
CATARACTS
Definition
THE LENS BECOMES HARD AND OPAQUE. THIS CAUSES VISION TO BECOME HAZY AND DISTORTED. THIS EVENTUALLY CAUSES BLINDNESS. THE BLINDNESS CAN BE TREATED WITH THE SURICAL REMOVAL OF THE LENS AND REPLACED WITH A LENS TRANSPLANT.
Term
AQUEOUS HUMOR
Definition
A CLEAR, WATERY FLUID THAT FILLS THE ANTERIOR SEGMENT OF THE LENS. SIMILAR TO BLOOD PLASMA.
Term
VITREOUS HUMOR
Definition
A GEL-LIKE SUBSTANCE THAT FILLS THE POSTERIOR SEGMENT OF THE LENS. HELPS TO PREVENT THE EYEBALL FROM COLLAPSING INWARD.
Term
INTRAOCULAR PRESSURE
Definition
PRESSURE INSIDE THE EYE
Term
SCLERAL VENUS SINUS
Definition
THE VASCULAR STRUCTURE ENCIRCLING THE ANTERIOR CHAMBER OF THE EYE AND THROUGH WHICH THE AQUEOUS HUMOR IS RETURNED TO BLOOD CIRCULATION
Term
GLAUCOMA
Definition
GLAUCOMA IS NOT JUST ONE EYE DISEASE, BUT A GROUP OF EYE CONDITIONS RESULTING IN OPTIC NERVE DAMAGE, WHICH CAUSES LOSS OF OF VISION. ABNORMALLY HIGH PRESSURE INSIDE YOUR EYE (INTRAOCULAR PRESSURE) USUALLY, BUT NOT ALWAYS, CAUSES THIS DAMAGE.
Term

OPHTHALMOSCOPE

(FUNDOSCOPE)

Definition
AN INSTRUMENT THAT ILLUMINATES THE INTERIOR OF THE EYEBALL; ALLOWING THE RETINA, OPTIC DISC, AND INTERNAL BLOOD VESSELS TO BE SEEN.
Term
FUNDUS
Definition
THE FUNDUS OF THE EYE IS THE INTERIOR SURFACE OF THE EYE, OPPOSITE THE LENS, AND INCLUDES THE RETINA, OPTIC DISC, MACULA, FOVEA, AND POSTERIOR POLE. THE FUNDUS CAN BE VIEWED WITH AN OPHTHALMOSCOPE.
Term
REFRACTED
Definition
LIGHT RAYS THAT ARE BENT
Supporting users have an ad free experience!