21 VT Operational Name, Portion of Visual Pattern Tested, & Spatial Direction

Question 1

ON: Base-in prism needed for vertical alignment of dissociated images

Answer 1

VT 3 and 13a

Question 2

Plus sphere needed for flicker neutralization of motion while patient is fixating at far

Answer 2

VT 4

Question 3

Plus sphere needed for flicker neutralization of motion while patient is fixating at far at 20 inches

Answer 3

VT 5

Question 4

Plus sphere needed for flicker neutralization of motion while patient is fixating at far at 40 inches

Answer 4

VT 6

Question 5

Maximum plus to standard acuity while patient fixates target at 20 feet

Answer 5

VT 7

Question 6

Same as Test No. 3 performed thru No. 7

Answer 6

VT 8

Question 7

Base-Out prism to 0.25D blur at far

Answer 7

VT 9

Question 8

Base-Out to Break and Recovery at far

Answer 8

VT 10

Question 9

Base-In to Break and Recovery at far

Answer 9

VT 11

Question 10

Same as Test No. 13A performed thru No. 7

Answer 10

VT 13b

Question 11

Maximum plus to equality of line target under dissociation thru cross-cylinder

Answer 11

Vt 14a

Question 12

Base-In prism to vertical alignment of dissociated line target thru 14A

Answer 12

VT 15a

Question 13

Maximum plus to equality of line target under fused conditions thru cross cylinders

Answer 13

VT 14b

Question 14

Same as 15A, Control lenses 14B

Answer 14

VT 15b

Question 15

Base-Out to blur out at near on reduced 20/20 Snellen

Answer 15

VT 16a

Question 16

Base-Out to Break and Recovery at Near

Answer 16

VT 16b

Question 17

Base-In prism to blur out at near on reduced 20/20 Snellen

Answer 17

VT 17a

Question 18

Base-In to Break and recovery at Near

Answer 18

VT 17b

Question 19

Minus sphere to blur on 0.62em type at 13 inches

Answer 19

VT 19

Question 20

Minus sphere to blur out at near on reduced 20/20 Snellen

Answer 20

VT 20

Question 21

Plus sphere to blur out at near on reduced 20/20 Snellen

Answer 21

VT 21

Question 22

Portion of Visual Pattern tested: VT 4, 5, 6, 7, 14a & b, 19, 20, 21

Answer 22

ACCOMMODATION

Question 23

Portion of Visual Pattern tested: VT 3, 13a, 8, 9, 10, 11, 13b, 15a & b, 16a & b, 17a & b,

Answer 23

CONVERGENCE

Question 24

Probing used on: VT 3, 13, 4, 5, 6, 7, 8, 11, 13b, 14a & b, 15a & b, 17a & b, 21

Spatial direction?

Answer 24

INHIBITION

Away from the plane of regard

Question 25

Probing used on: VT 9, 10, 16a & b, 19, 20

Spatial direction?

Answer 25

STIMULATION

Towards the plane of regard

Question 26

In visual pattern tested, Accommodation is secondary to Convergence in these 3 VTs.

Answer 26

VT 10, 16b, 17b