The Eye WK6 L4 Flashcards
WHAT IS THE CONJUNCTIVA?
TRANSPARENT MUCOUS MEMBRANE AROUND THE EYE
WHERE IS THE CONJUNCTIVA?
LINES INNER EYELID SURFACE & ANTERIOR EYE SURFACE EXCEPT CORNEA
WHAT DOES THE CONJUNCTIVA DO?
SECRETS THIN MUCOUS FILM TO STOP EYE FROM DRYING OUT
WHAT IS THE LACRIMAL APARATUS?
LACRIMAL GLAND AND DUCTS ABOVE EYE
WHAT DOES THE LACRIMAL APARATUS DO?
PRODUCES TEAR FLUIDS INTO LACRIMAL DUCTS
WHAT DO THE TEARS DO?
WASH AWAY FOREIGN PARTICLES AND LUBRICATE EYES
WHAT IS INSIDE TEARS?
BACTERIAL ENZYMES THAT FIGHT INFECTION
WHAT ARE THE EXTRINSIC EYE MUSCLES?
MUSCLES IN EYES THAT CONTROL EYE MOVEMENT
HOW MANY EXTRINSIC EYE MUSCLES ARE THERE?
6
WHAT ARE THE 6 EXTRINSIC EYE MUSCLES?
SUPERIOR RECTUS - INFERIOR RECTUS - LATERAL RECTUS - MEDIAL RECTUS - SUPERIOR OBLIQUE - INFERIOR OBLIQUE
WHAT DOES THE SUPERIOR RECTUS DO?
ELEVATES EYE
WHAT DOES THE INFERIOR RECTUS DO?
DEPRESSES EYE
WHAT DOES THE LATERAL RECTUS DO?
MOVES EYE LATERALLY
WHAT DOES THE MEDIAL RECTUS DO?
LOVES EYE MEDIALLY
WHAT DOES THE SUPERIOR OBLIQUE DO?
ROTATIONAL MOVEMENT
WHAT DOES THE INFERIOR OBLIQUE DO?
ROTATIONAL MOVEMENT
WHAT EYE MUSCLES ARE PART OF OCULAR MOTOR NERVE?
SUPERIOR RECTUS MUSCLE - MEDIAL RECTUS MUSCLE - INFERIOR RECTUS MUSCLE - INFERIOR OBLIQUE MUSCLE
WHAT EYE MUSCLES ARE PART OF TROCHLEAR NERVE?
SUPERIOR OBLIQUE MUSCLE
WHAT EYE MUSCLES ARE PART OF ABDUCENS NERVE?
LATERAL RECTUS MUSCLE
WHAT ARE THE TUNICS (LAYERS) OF THE EYEBALL?
OUTER FIBROUS LAYER - MIDDLE VASCULAR LAYER - INTERNAL LAYER
WHAT IS THE OUTER FIBROUS LAYER?
TWO REGIONS - SCLERA / CORNEA
WHAT IS THE SCLERA?
WHITE PART OF EYE BALL
WHAT DOES THE CORNEA DO?
ADMITS LIGHT INTO EYEBALL
WHAT IS THE MIDDLE VASCULAR LAYER?
THREE REGIONS - CHOROID - CILIARY BODY - IRIS
WHAT IS THE CHOROID?
PIGMENTED LAYER BEHIND RETINA
WHAT IS THE CILIARY BODY?
THICKEND EXTENSION OF CHOROID FORMING MUSCULAR RING AROUND LENSE
WHAT IS THE IRIS?
ADJUSTABLE DIAPHRAM CONTROLLING PUPIL DIAMETER AND THE AMMT OF LIGHT ENTERING EYE
WHAT IS THE INTERNAL LAYER?
CONTAINS RETINA AND BEGINING OF OPTIC NERVE
WHAT ARE OPTICAL COMPONENTS?
TRANSPARENT STRUCTURES THAT ALLOW LIGHT IN AND BENDS LIGHT TO FOCUS IMAGES ON REINA
WHAT IS THE OPTIC NERVE RESPONSIBLE FOR?
VISION
WHAT ARE THE TYPES OF PHOTO RECEPTORS?
RODS - CONES - RETINAL GANGLION CELLS
WHAT DO PHOTO RECEPTORS DO?
ABSORB LIGHTS AND PRODUCE VISUAL IMAGES
HOW MANY TYPES OF CONES ARE THERE?
3
WHAT ARE THE 3 TYPES OF CONES?
BLUE SENSITIVE - GREEN SENSITIVE - RED SENSITIVE
WHAT WAVE LENGTHS DO BLUE SENSITIVE CONES HAVE?
SHORT WAVELENGTHS WITH PEAK SENSITIVITY OF 420NM
WHAT WAVE LENGTHS DO GREEN SENSITIVE CONES HAVE?
MEDIUM WAVELENGTHS WITH PEAK SENSITIVITY OF 531NM
WHAT WAVE LENGTHS DO RED SENSITIVE CONES HAVE?
LONGEST WAVELENGTHS WITH PEAK SENSITIVITY OF 558NM
WHERE DO VISUAL PATHWAYS BEGIN?
PHOTO RECEPTOR CELLS IN POSTERIOR LAYER OF RETINA
HOW DO THE PHOTO RECEPTORS WORK?
RELEASE NEUROTRANSMITTER GLUTAMATE WHICH DETERMINES WETHER SYNAPSING BIPOLAR CELLS GET EXCITED