NORM VALUES

Question 1

cover test D and N

Answer 1

norm:
D: orthophoria
N: ortho-6^ exo-

abnorm:
any eso, >6 exo

Question 2

subj phoria D and N

Answer 2

D: orthophoria
N: ortho-6^ exo

Question 3

grad AC/A
calculated AC/A

Answer 3

norm:
grad: 3-4^/D
calculated: 5.3 ^/D

abnorm:
<2^/D
>5^/D

Question 4

near point of convergence (NPC

Answer 4

norm:
5cm break/ 7cm recovery

abnorm:
>7cm break/ 9cm recovery

Question 5

near point of accomo (NPA/AA)

Answer 5

max: 25- 1/2.5 (age)
expected: 18- 1/3 (age)
min: 15- 1/4(age)

Question 6

vergence reserves D and N

Answer 6

D: BI:13^ BO: 19^
N: BI:10^ BO: 14^

abnorm:
D: BI:10^ BO: 14^
N: BI: 7^ BO: 10^

BI: NFV
BO: PFV

Question 7

NRA/PRA

Answer 7

NRA: +1.75D
PRA: -1.75D

abnorm:
+/-1.50D

Question 8

accomo facility (BAF/MAF)

Answer 8

BAF: 8cpm
MAF: 11cpm

abnorm:
BAF: 5cpm
MAF: 6cpm

Question 9

vergence facility (12BO/3BI)
vergence facility (8BO/8BI)

Answer 9

(12BO/3BI): > or = 12cpm
(8BO/8BI): 5-10cpm

abnorm:
(12BO/3BI): <9cpm
(8BO/8BI): <3cpm

Question 10

MEM

Answer 10

+0.25 to +0.75D

any negative value is abnormal