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PPO > Static Retinoscopy > Flashcards

Static Retinoscopy Flashcards

1
Q

the objective determination of the pt’s refractive state by locating the far point (PR) of the pt’s eye with the retinoscope and using lenses to move the PR to the examiner’s entrance pupil

A

retinoscopy

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2
Q

what does the clnician examine the light reflecting from

A

the external limiting membrane of the pt’s retina

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3
Q

the purpose of retinoscopy is the objective measurement of the …..

A

rx the pt needs for distance

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4
Q

a flat mirror with a hole in the center, mounted on a handle used w/ an external light source (candle)

A

spot retinoscope

the earliest

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5
Q

pt fixates on a distant target w/ accommodation realxed and the distance rx is determined

A

static

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6
Q

pt fixates on a near target and the status of his accommodation is evaluated

A

dynamic

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7
Q

the point in space conjugate to the pt’s retina when accommodation is relaxed

A

far point or punctum remotum

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8
Q

2 corresopnding and reversible optical locations

A

conjugate points

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9
Q

PR located at infinity

A

emmetropia

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10
Q

PR located “beyond infinity”

A

hyperopia

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11
Q

PR located at a real point in space in front of the pt’s eye

A

myopia

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12
Q

PR is a conoid w/ 2 line foci

A

astigmatism

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13
Q

begins at the bulb of the retinoscope and ends at the external limiting membrane of the pt’s eye

A

illumination system

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14
Q

begins at the pts external limiting membrane and ends at the clinicians retina

A

observation system

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15
Q

sleeve down-divering light

A

plane mirror

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16
Q

parallel light

A

para-stop

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17
Q

converging light that focuses behind the pt

A

long concave mirror

18
Q

sleeve all the way up-converging light that focuses btwn the clinician and the pt

A

short concave mirror

19
Q

motion of light on the pt’s fundus i the SAME as the motion of streak on the pts face, but OPPOSITE to the motion S’

A

plane mirror
para-stop position
long concave mirror position

20
Q

motion of light on the pt’s fundus is the OPPOSITE of the motion of the streak on the pt’s face, and OPPOSITE to the motion of S’

A

short concave mirror

21
Q

sleeve down
diverging light leaves retinoscope and
light on pts fundus moves in SAME direction as intercept

A

plane mirror

22
Q

sleeve up
converging light leaves retscope and
light on pts fundus moves in OPPOSITE direction as intercept

A

short concave mirror

23
Q

what is seen at the plane of the pt’s pupil

A

the reflex

24
Q

vergence of light rays observed during retinoscopy depends on

A
  1. refractive error
  2. status of accommodation
  3. lenses we place in front of the pt’s eye
  4. sum of these elements dtermines the location of the focal point of the pt’s eye
25
Q

retinoscopy motion depends on

A
  1. lensess
  2. accommodation
  3. discrepency (ref error)
26
Q

in a plane mirror…

  1. w/ motion is:
  2. against motion is:
  3. neurtrality is:
A
  1. PR not btwn you and pt
  2. PR btwn you and pt
  3. PR at your entrace pupil
27
Q

In against motion, when the light is moved down, the reflex in the pupil moves….

A

up

28
Q

in against motion, when the light is moved up, the reflex in the pupil moves….

A

down

29
Q

in neutrality, PR is at the examiner’s _______
reflex fills the pupil but doens’t appear to ____ but flashes ____
-_____ reflex
-______ view

A

entrance pupil
move, on and off
brightest
maxwellian

30
Q

in a short concave mirror…..

  • motions _______
  • PR is ___ btwn clinician and pt in against motion
  • PR is _______ clinician and pt in with motion
A
  • reverse
  • NOT
  • between
31
Q

moving to the far point can only be done when the pt is …..

A

myopic. and the PR is a real point

32
Q

moving to the far point works best if the PR is …

A

20 cm to 150 cm from pt’s eye (1.5 to 5D of mypia)

33
Q

neutrality occurs when the sum of the pts ______, ______, and the lenses places the pts _______ at our entrance pupil

A

refractive error
accommodatoin
far point

34
Q

minus lens added to the gross to diverge the light and move the PR from your entrance pupil to infinity

A

working distance (D)

35
Q

gross plus working distance

A

net retinoscopy

36
Q

what is the lens that makes the pts fundus conjugate to infinity

A

net retinoscopy

37
Q

in SLEEVE DOWN:
w/ motion: PR ________ you and pt
against motion: PR _______ you and pt
neutrality: PR _________ your entrance pupil

A
  • NOT between
  • between
  • at
38
Q

motion observed depends on (3 things)

A
  1. location of the PR of the pts eye
  2. positoin of the sleeve of the retscope
  3. how far you are from the pt
39
Q

What does the streak test on astigmatic eye

A

the meridian of the eye perpendicular to the long axis of the streak

40
Q

the direction of motion of the streak is always _______ to the meridian being tested

A

parallel

PPO (14 decks)

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