Visual System Cont'd Flashcards
This type of COLOR BLINDNESS is characterized by SHORTENED LUMINOSITY function in BLUE REGION.
Tritanopia
True or False: YELLOW-BLUE color blindness is much MORE RARE than RED-GREEN color blindness.
TRUE
In regards to TRITANOPIA, a person is regarded as missing ____1____ receptors or a ____1____ receptor process involving _____2____ in ____1___ region.
Blue
Iodopsin
This type of COLOR BLINDNESS is characterized by a person ONLY being able to see BLACK, WHITE and SHADES OF GRAY.
Monochromatism
True or False: DARK ADAPTATIONS occur slowly with rods.
FALSE, DARK ADAPTATION occurs RAPIDLY with CONES.
True or False: RODS adapt to dark slower than cones.
TRUE, RODS adapt to dark SLOWER than do cones
In regards to DARK ADAPTIONS, ____________ REGENERATES much more RAPIDLY than _____________.
IODOPSIN regenerates FASTER THAN RHODOPSIN
True or False: DARK ADAPTATION CURVES following relatively WEAK pre adapting lights BEGIN at a LOWER POINT and reach their plateau more __________.
Rapidly
DARK ADAPTATION CURVES following relatively WEAK pre adapting lights show less of a _____________.
Cone-Rod Break
CRITICAL FLICKER FREQUENCY (CFF) is measured by a(n) _______________.
Episcotister
The CFF for RODS is ___ to ___cps. (Low intensity light)
2-3
CFF for CONES is ___cps. (High intensity light)
60
This is a CHANGE IN RELATIVE BRIGHTNESS of various wavelengths of light in passing from PHOTOPIC to SCOTOPIC vision and vice versa.
Perkinje Shift
This TYPE OF VISION refers to the PERCEPTION of PATTERNS and details in the VISUAL WORLD.
Spatial Vision
This TEST of SPATIAL VISION has the individual READ VARIOUS LINES OF LETTERS of various sizes.
Snellen Test
This TEST of SPATIAL VISION has the individual DIFFERENTIATE C’s and O’s from one another.
C-Test
Name the TWO (2) MEASURES of SPATIAL VISION.
Minimum Separable
Minimum Visible
Name the TWO (2) types of MINIMUM SEPARABLE tests.
Snellen
C-Test
This is the method of MAPPING OBJECT VISION.
Perimetry
What TWO (2) DEFICITS can be DETECTED by means of PERIMETRY?
Scotoma
Tunnel Vision
This type of VISUAL DEFICIT is characterized by an AREA OF VISUAL LOSS.
Scotoma
This type of VISUAL DEFICIT is characterized by LOSS of all PERIPHERAL VISION.
Tunnel Vision
What are the TWO (2) types of movement in regards to vision?
True Movement
Apparent Movement
TRUE MOVEMENT can be SIGNALED to the brain in 1 of what 2 ways?
1.) SEQUENTIAL STIMULATION of retinal receptors (may get AFTER IMAGES)
OR
2.) EYES FOLLOWING a moving OBJECT (NO after images)
This type of AFTER IMAGE following SEQUENTIAL STIMULATION of retinal receptors result in movement in the SAME DIRECTION as the original stimulus.
Positive
This type of AFTER IMAGE following SEQUENTIAL STIMULATION of retinal receptors result in movement in the OPPOSITE DIRECTION as the original stimulus.
Negative
