Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Schwartz NBEO 1

1000 facts

( ) blue, ( ) green ( ) red are the cone peaks 450,510,570
___ quanta are minimum for detection in dark adapted person 5 to 14, average of 9
a deuteranomolous trichromat mataches ___ with red and green on the anomoloscope, a normal trichromate would see more___ yellow, green
a gray square will appear red on a ___ background because of simulataneous contrast green
a myope sees a __ center with a ___ fringe when looking at a cobalt filter red , blue
a person cannot be a ____ deuteranomolous deuteranope
a protanope and a deuteranope have the same ___ luminosity curve scotopic
__ ( not effect) states the luminance of a mixture of colors is equal to the sum of the luminance of it parts (luminance is additive) Abney's law
airy's disc is due to __ diffraction
an emmetrope with +1.00 will see a __ circle with __ center blue, red
at the rod saturation pt, 10% of the pigment is ___ bleached
___ motion is apparent motion of small isolated object in dark environment Autokinetic
___ masking is explained by a latency difference backward
___ of the retina can be seen as moving spots while looking at a brightly illuminated surface (blue sky) blue arcs
____ are entopic phenomena seen in the center of the fovea blue spots or maxwell spots
___ color vision problems can be due to acquired ON defect blue yellow
Cataracts and age ___ CFF decrease
Cells in an ocular dominance column respond to stimuli in the __ orientation same
CFF decreases ___ by age 40,70% is due to ___ decrease, senile miosis
CFF __ with yellowing of the lens decreases
CFF __ with light intensity , if high frequency increases
it takes __ minutes for 50% of rods to regenerate and __ min for 50% of cones to regenerate 5, 1.5
kitten's critical period is 1-3 months
Lambert surface reflects light equally in __ direction (a perfect diffuser) ALL
large pupils effect VA by __ & ___ aberration spherical and chromatic
location of maximal stimulus for rods is > 20 degrees
__ is the rate of passage of light from a source luminous flux
clouds are white due to ____ scatter Tyndall
color confusion is the basis for ____ pseudoisochromatic plates
color specification can be demonstrated by __,__,___ hue, chroma, value
complete spatial summation is implied in _____ Ricco's law
cones are maximally sensitive @ ___ 555 nm
Contrast sensitivity peaks at all spatial frequencies by age ___ and remains until __ 18, 39
contrast sensitivity shows overall depression under ___ condition mesopic
___ varies directly with the effective size of a retinal unit depth of focus
___ is the minimum visible detection VA
____'s colors generally attributed to different photoreceptor latencies fechner's
for given exposure to light, __ bleach faster cone
For every __ you move out on the horopter, panum's fusional area gets larger by __ degree 5, 1
__ and __ contribute to chroma Hue and saturation
__ specifies how much color stimulus differs from a white light of equal brightness HUE
if cones and rods are both bleached, after 5 minutes, more __ than __ will be regenerated cones , rods
if you induce exotropia, a monkey will be able to see out of either, , but not at the same time
if you wanted to test scotopic dark adaptation, you would use ___ target located __ degrees eccentrically blue/green , 20
in a badal optometer, a __, lens would provide __ per centimeter of object displacement +40, 16D
in the dark, accommodative posture is __ infinitiy inside
__ yields a continuous spectrum incandescence
in the leaf room, all __ cues are removed monocular
induced effect is from X __. geometric effect is from __ 180, x090
monkeys critical period is ___ 6 wks
monkeys raised in a confined environment will exhibit ___ myopia
Moore 's lighting streaks may be a sign of ___ PVD
most common ectopic phenomena are from ___ vitreal floaters
most common form of hereditary CV deficiency is __ deuteranomaly
most common method of determining the horopter is the __ apparent fronto-parallel plane
___ parallax is a cue that is within arms length motion
__ myopia is due to resting accommodation, chromatic aberration, spherical aberration, and extrafoveal fixation Night
Normal vernier acutity is __ 2-4 seconds
panum's fusional area is the largest ___ in the periphery
peak of CFF is __ 5 cycles/degree
phosphenes are more commonly seen in ___ women, and are seen __ and __ middle aged, vertically and temporally
pulfrich phenomenon is seen ___ with filter on the OD ey e Counterclockwise
receptive fields of complex cells are selective for ____ motion of a certain orientation
red curve is missing for __, green for __ prontonopes,deuteronopes
red-yellow are the colors that are confused by a ____ tritanope
refocusing with (+) lens affects CSF @ __ frequency high
retinal vessels are not visible due to ___ effect troxler effect
rods are maximally sensitive @ 505
signal detection DOES NOT detect ___ background noise
Sky is blue due to ____ rayleigh scatter
small pupil decreases VA by ___ Diffraction
snellen acutiy compares with CSF at ___ frequency highest frequency
spectral sensitivity shifts towards __ wavelengths as you age LOW
stereopsis requires ___ disparity HORIZONTAL
stiles crawford effect I (angle affects brightness) has to do with wave property of light
stiles crawford effect I is present in __ and __ , but more in ___ rods and cone, cones
temporal summation is ___ sec for scotopic and __ msec for photoptic 100 ms, and 10-50 msec
temporal summation is ___ of wavelength independent
temporal summation is longer for ___ stimuli and lower __ levels pattern, light
the ___ wave has the highest amplitude B
the best measure of resoln acuity is __ grating stimuli
the flicker and cascade methods represents techniques used in ____ heterochromatic photometry
the greatest modulation in a diagram is the one with the greatest difference in peak and trough
the hue that will appear least saturated to deuteranope is ___ green
the ___is a unit of luminous flux (luminous pwr) lumen
the main reason for modular transfer is ___ image on the retina quality
the min distance that can be resolved at 1km with the unaided eye is ___ 26.8
the nonius horopter is referred to as the ___ horopter equi-angular
the peak of phototopic luminosity curve is ___ 555
the perceived brightness of a brief single flash stimulus remains constant if time is ___ than the critical duration greater
the photochromatic interval is __ for red stimuli and is larger for ____ 0, blue/green
____ are designed around confusion lines in the CIE diagram pseudoisochromatic plates
the process of colors analysis begins at the ___ retina
the purkinje shift prves the __ theory purkinje
the spatial modulation transfer fxn is the ratio of the input frequency to the __ input contrast
Luminance, chromaticity, s phase( LCS) potential are ___ graded, transient
the threshold sensitivity of ___ is more affected than cones by a given amt of pigment bleaching rods
the time required to perceive apparent motion is a ___ msec pause btw 2 targets 50-60
the __ is a measure of retinal illuminance troland
the ___ is the luminance of a stimulus times the area of the entrance pupil troland
under scoptopic conditions , ___ will seems brighter blue poker chips
___ light causes cataract changes and is the most damaging to ocular structures UV B 300
VA ___ as airy disc __ increases, decreases
__ is the best measure of VA vernier
___ are preferred in the cortex vertical
VM circle is the locus of pts with ---geometric retinal disparity 0
when you fixate on a dart target, it is __ oculoexentric
with ODX90 and OS X 180 right wall will seem ___ farther out
Created by: rajal2010