Final Midterm

Question 1

What is the order of the chain of vision?

Answer 1

Visual stimulus → light → media → focus → retina → nerves → brain → output

Question 2

Chain of Vision: which of the following is only applicable to glasses?

Answer 2

focus

Question 3

Chain of Vision: which of the following is linked if the patient has a stroke and their oculomotor system is impaired?

Answer 3

brain

Question 4

What is the number 1 cause of vision impairment for patients under 65?

Answer 4

diabetic retinopathy

Question 5

What is the number 1 cause of vision impairment for patients over 65

Answer 5

macular degeneration

Question 6

Does Eyesight matter in LVR? (3 definitions)

Answer 6

fully sighted, partially sighted, legally blind

Question 7

LogMAR & Charts Preview: What are the 10 components

Answer 7

1. psychometric integrity
2. test task equivalence
3. acuity
   4 seven factors in VA measurement
4. four distance types of VA
5. weber’s law
6. four factors in loglairvoyance
7. four near nomenclature systems
8. multiplicative identity

Question 8

What is the optometry’s calling card of significant thinking?

Answer 8

psychometric integrity — say what we measure, and measure what we say

Question 9

What is the optometry’s calling tool of significant measurement?

Answer 9

test task equivalence — when we have measurements, we can make adjustments based on WD and size

Question 10

What is the useful definition of acuity?

Answer 10

sharpness of perception

Question 11

What are 4 kinds of visual acuity?

Answer 11

detection — something is there! “Ah Ha!”
resolution —there is a gap! “Landolt C
recognition — i know what that is is! *Letters
vernier: Those lines are in line!

Question 12

What is the standard for resolution acuity?

Answer 12

Landolt C

Question 13

When does size matter?

Answer 13

Only when the distance is the same

Question 14

What is the main factor in VA measurement?

Answer 14

angular subtense

Question 15

The visual JND is used to create a paradigm of using VA measurements to predict the effects of changes in _____, ______, and _____.

Answer 15

working distance
dioptric lens power
telescopes power

Question 16

What is used to predict the effects of changes in working distance, dioptric lens power, and telescopes power?

Answer 16

visual JND

Question 17

What is Weber’s Law?

Answer 17

The increase in stimulus which is necessary to produce a just noticeable difference (JND) in sensation bears a constant ratio to the stimulus from which the difference is noted

Question 18

How many units is each step in constant ratio paradigm?

Answer 18

0.1 log units

Question 19

What are the four steps of Loglairvoyance?

Answer 19

1. measure & record
2. set a goal
3. count steps
4. implement (power & WD)