Retinoscopy (Rogala)

Question 1

Is retinoscopy subjective or objective test?

Answer 1

Objective refraction

Question 2

True/False: Subjective refraction is at a level of outer limiting membrane.

Answer 2

True

Question 3

Reflection of light from inside the eye produces a ________ _______.

Answer 3

Fundus Reflex

Question 4

List some reasons for why we do retinoscopy?

Answer 4

Starting point for the subjective refraction
Fact checker (check subjective results)
Severe handicapped patient

Question 5

Which lens (+ or -) would you use to neutralize with motion?

Answer 5

Plus lens

Question 6

Do optometrists use plus cylinder or minus cylinder?

Answer 6

minus cylinder

Question 7

Do we start with with motion or against motion as optometrists?

Answer 7

against motion

Question 8

Do we use well lit room, or dimmed room?

Answer 8

Dimmed

Question 9

Measure working distance, why is it important?

Answer 9

Because we have to subtract our working distance.
Formula: for 50 cm 1/.5=2 (so add -2.00 D to compensate)
or 1/.67= 1.5 (so add -1.50 D to compensate)

Question 10

If the pt is the same in all meridians, you spin the light all the way around and it is the same the pt is what?

Answer 10

Spherical

Question 11

If the pt has differing meridians the pt is what?

Answer 11

astigmatic

Question 12

Moving far point to the retinoscope (with lenses) to neutralize

Answer 12

Static retinoscopy

Question 13

Moving retinoscope to far point to neutralize

Answer 13

Dynamic retinoscopy (good with peds)

Question 14

Range of uncertainty between definite plus and definite minus.

Answer 14

Neutrality

Question 15

What are the 6 aspects of reflex that indicate refractive status.

Answer 15

Brightness (> brightness closer to end point/neutrality)
Direction of motion (decreases closer- end point)
Speed of motion (increases closer to neutrality)
Width (narrow as closer to neutrality)
Definition (> definition closer to neutrality)
Alignment (closer to angle more aligned)

Question 16

What do you do if you have confused fundus reflex?

Answer 16

Just pay attention to the reflex in center of pupil

Bracket your definite minus and plus…

Question 17

What is the technique called by adding plus to blur the target? to make sure they aren’t accomodating

Answer 17

Fogging

Question 18

True/False: When you get to neutrality the patient is accommodating.

Answer 18

False. You still have working distance in play which should make it less blurry.

Question 19

What are some potential problems?

Answer 19

Doc too far to the side
Reflections from cornea or lenses
Accommodation

Question 20

How do you know patient is accommodating with retinoscopy?

Answer 20

Pupil shrinks down

Changes from with motion to against motion without changing lenses (or vice versa)

Question 21

True/False: Patients can be corrected too well, and they may not like it.

Answer 21

True

Question 22

True/False: Retinoscopy findings and subjective refraction are highly correlated.

Answer 22

True