VF

Question 1

Normal VF degree of Human eye

Answer 1

Temp 100 deg
Sup + Nasal 100 deg
Inf 75 deg

Question 2

What VF Measure ?

Answer 2

1.Light Sensivity
2.Topographic Location

1+2 = Perimetry

Question 3

Two type of Perimetry

Answer 3

1.Kinetic > Moving Objecy
2.Static > Stationary Object

Question 4

Goldmann Have Roman letter and Intensity what is mean ?
3 letters

I + 1 + a

Answer 4

I - V is a size : V largest ( 4 fold diff )
1-4 is intensity : 4 brightest
a - e : e is brightes

Question 5

Second letters : 1-4 is 5 db change
a-e 1 db change

Question 6

What is Apostilbs ?

Answer 6

• Light intensity
• Invert of DB i Humphrey

ex .
10,000 apostilbs = 0 DB
so -DB = ต้องใช้แสงมากกว่าปกติ

Question 7

From FOS what is threshold ?

Answer 7

threshold = minimum db to see
50 % of stimuli seen

Question 8

What factors affecting threshold ?

Answer 8

• Stimulus Size ( III , 50-0 dB )
• Stimulus duration
• Background illumination
  (31.5 asb due to saturated rod cell )

Question 9

What is SITA ?

Answer 9

Swedish interactive threshold algorithm

Question 10

What is Suprathreshold use for ?

Answer 10

Screening test , not to follow up
( due to use higher light )

Question 11

How SITA Work ?

Answer 11

Estimated according to database - ( Bayesian statistical
analysis )

Question 12

Describe the test program for SITA ?

Answer 12

1.30-2 ( 6 deg apart )
30degrees , 76 test points

2.24-2 ( 6 deg apart )
24degs,54 test poonts

3.10-2 ( 2 deg apart )
10degs,68 test points

Question 13

Which point is much have in 30-1 , 24-2

Answer 13

Nasal step
( Not nasal part , it is temporal )

Question 14

What is 24-2c

Answer 14

normal 24-2 + 10 point in 10degree

Question 15

What is the appropriate pupil size ?

Answer 15

3mm if not , generalized depression

Question 16

Name 3 special test

Answer 16

SWAP
FDT
FDF

Question 17

Step to single field analysis ?

Answer 17

1.Quality and Reliability
2.Normality or abnormality
3.Artifacts identify

Question 18

Describe Reliability indices ?

Answer 18

Fixation loss < 25 %
FP < 15 %
FN < 5 %
FT : 33-36 DB

Question 19

What is False Positive ?

Answer 19

Patient response when no stimulus
( มีเสียง )
- “Happy trigger “

Question 20

What is false negative

Answer 20

1.First time > Response
2.Second time same spot > In attentio s

Question 21

Approx the test time for SITA ?

Answer 21

normally 4-8 mins

Question 22

What do you call this ?

Answer 22

Threshold value and grayscale map

Question 23

Describe TD and PD

Answer 23

Total Deviation
= Patient - Normal

Pattern Deviation
- Ordering Numerical threshold then select number 7
add to all > sometime become normal

Question 24

What this mean ?

Answer 24

the point where normal people will be

Question 25

Global indices ?

Answer 25

1.MD - grading glaucoma 2.PSD 3.VFI

Question 26

What is MD ?

Answer 26

How big is the lesion .

Question 27

MD grading ?

Answer 27

Question 28

How to use PSD ?

Answer 28

PSD if too much = focal vf defect of low PSD = normal or large defect

Question 29

What is VFI ?

Answer 29

Compared percent to normal pop . and can use for regression

Question 30

Where is the blind spot ?

Answer 30

15 deg temp 6 deg wide 8 deg high

Question 31

VF abnormality due to Hodapp

Answer 31

3 points of <5% at least 1 point <1%

Question 32

VF abnormal due to OHTS ?

Answer 32

PSD with P<5% With outside normal limits and 3 consecutive VF test .

Question 33

What caused Generalize Depression ?

Answer 33

1. Cataract 2. Refractive error 3. Glaucoma 4. Meida opacity 5. Learning effect

Question 34

Pattern of VF glaucoma defect

Answer 34

1.Paracentrals scotoma 2.Arcuate Scotoma 3.Nasal step 4.Altitudinal defect 5.Temporal wedge 6.Central Island

Question 35

What is GHT ?

Answer 35

Glaucoma map comparing upper and lower

Question 36

What artifact ?

Answer 36

Lid artifact Ring artifact Learning artifact

Question 37

Interprete

Answer 37

Question 38

interprete

Answer 38

Question 39

interprete

Answer 39

Question 40

Interprete

Answer 40

Question 41

interprete

Answer 41

Question 42

interprete

Answer 42