Graphical Analysis Part 2

Front 1

What is plotted on the Y axis in graphical analysis?

Back 1

Accommodative Demand Stimulus

Front 2

What is plotted on the X axis in graphical analysis?

Back 2

Convergence Demand Stimulus

Front 3

How can you determine if the problem is a binocular one?

Back 3

Patch an eye and see if the problem persists (genius!)

Front 4

When are lenses a good choice to prescribe to correct an exo or an eso?

Back 4

When the patient has a high AC/A ratio

Front 5

What is the ZCSBV?

Back 5

Zone of clear single binocular vision

Front 6

When is Binocular vision training a good choice for correcting a vision problem?

Back 6

when the ZCSBV has a small width or if the problem is accommodation

Front 7

Would you expect a high, low or normal Base Out vergence's from an EXO at near with low PFV?

Back 7

Low BO

Front 8

Would you expect a high, normal or low NRA from an EXO at near with low PFV?

Back 8

Low NRA

Front 9

Would you expect an Excess, normal or reduced NPC from an EXO at near with low PFV?

Back 9

NPC is reduced

Front 10

Would you expect an EXO at near with low PFV to be slow on the plus side, minus side, or both sides when testing facility?

Back 10

(plus side)

Front 11

Would you expect a lead, lag or normal results with MEM from an EXO at near with low PFV?

Back 11

Shows a lead in BCC and MEM (remember these are always linked!!)

Front 12

would you expect a high, normal, or low Base In Vergences from an Eso at near and low NFV?

Back 12

Low BI

Front 13

would you expect a high, normal, or low PRA from an Eso at near and low NFV?

Back 13

Low PRA

Front 14

Would you expect an Eso at near with low NFV to be slow on the plus side, minus side, or both sides of Facility?

Back 14

Slow on facility (the Minus side)

Front 15

Would you expect a lead, lag or normal results with BCC from an Eso at near with low NFV?

Back 15

BCC and Mem produce a high lag

Front 16

IF a patient has a problem with Accommodation would you expect a low or high PRA?

Back 16

Low PRA

Front 17

If your patient fails on plus accommodative facility monocular what could be the problem?

Back 17

Accommodative Excess or spasm

Front 18

If your patient fails on minus accommodative facility monocularly what could be the problem?

Back 18

Accommodative insufficiency

Front 19

If your patient fails on both minus and plus facility monocularly what is the problem??

Back 19

Accommodative in facility

Front 20

If your patient fails on minus or plus binocularly what do you expect?

Back 20

NRA and/or PRA will be low

Front 21

Which is easier to train with BV? A NFV or a PFV deficiency

Back 21

An NFV deficiency

Front 22

What is easier to train? a NFV or a PFV deficiency?

Back 22

a patient with NFV is harder to train

Front 23

If the AC/C ratio what would be your treatment plan

Back 23

Prims and VT are possibilities but NOT LENSES!

Front 24

How would you treat a patient with a convergence insufficiency? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 24

Lenses not a good choice because of low AC/A
Use a BO prism for training
Use a BI prism at near for prescribing

Front 25

How would you treat a patient with a convergence excess? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 25

Lenses good choice! high AC/C (so you would add plus at near)
Use a BI prism for training if the excess is low
DO NOT PRESCRIBE PRISMS!

Front 26

How would you treat a patient with a divergence insufficiency? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 26

Lenses not a good choice because of low AC/A and cannot add plus to distance Rx
BI prism for training (difficult)
BO prism for prescribing but watch the near vision!

Front 27

How would you treat a patient with a divergence excess? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 27

Lenses good choice! high AC/C (over minus at distance)
BO prism for training
prescribe BI prism but watch the near vision

Front 28

How would you treat a patient who is a basic Exo? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 28

Lenses good choice if normal or high AC/C (over minus)
BO prism for training
prescribe BI prism

Front 29

How would you treat a patient who is a basic Eso? What type (BI or BO) prism would you use to train? What prism would you prescribe?

Back 29

Lenses good choice if normal or high AC/C
BI prism for training (difficult)
prescribe BO prism

Front 30

Presbyopes are harder to graph. What will their results show?

Back 30

increased exo at near
increased BI prism and decreased BO prism
Decreased PRA

Front 31

You should only over minus a patient when for BV problems when ...

Back 31

a patient has high AC/C and adequte amps

Front 32

What is the best way to prescribe a vertical prism?

Back 32

Using vectographic data

Front 33

What are some of the ways Sheards is a better method than Percivals?

Back 33

Better at distance
More Strict than Percivals
Can Apply to verticals

Front 34

What are some of the down falls of the Sheards method?

Back 34

Low Esos and High Exos may still have problems even though they pass Sheards
Doesn't consider Narrow Range

Front 35

What are some of the advantages of Percival's over Sheards?

Back 35

Works better at near than Distance

Front 36

What are some of of the down falls of the Percival method?

Back 36

Not useful with small zone width
large phoria could still have a problem even when meeting Percival's criteria. Not good at distance