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36 Cards in this Set

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What is plotted on the Y axis in graphical analysis?
Accommodative Demand Stimulus
What is plotted on the X axis in graphical analysis?
Convergence Demand Stimulus
How can you determine if the problem is a binocular one?
Patch an eye and see if the problem persists (genius!)
When are lenses a good choice to prescribe to correct an exo or an eso?
When the patient has a high AC/A ratio
What is the ZCSBV?
Zone of clear single binocular vision
When is Binocular vision training a good choice for correcting a vision problem?
when the ZCSBV has a small width or if the problem is accommodation
Would you expect a high, low or normal Base Out vergence's from an EXO at near with low PFV?
Low BO
Would you expect a high, normal or low NRA from an EXO at near with low PFV?
Low NRA
Would you expect an Excess, normal or reduced NPC from an EXO at near with low PFV?
NPC is reduced
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?
(plus side)
Would you expect a lead, lag or normal results with MEM from an EXO at near with low PFV?
Shows a lead in BCC and MEM (remember these are always linked!!)
would you expect a high, normal, or low Base In Vergences from an Eso at near and low NFV?
Low BI
would you expect a high, normal, or low PRA from an Eso at near and low NFV?
Low PRA
Would you expect an Eso at near with low NFV to be slow on the plus side, minus side, or both sides of Facility?
Slow on facility (the Minus side)
Would you expect a lead, lag or normal results with BCC from an Eso at near with low NFV?
BCC and Mem produce a high lag
IF a patient has a problem with Accommodation would you expect a low or high PRA?
Low PRA
If your patient fails on plus accommodative facility monocular what could be the problem?
Accommodative Excess or spasm
If your patient fails on minus accommodative facility monocularly what could be the problem?
Accommodative insufficiency
If your patient fails on both minus and plus facility monocularly what is the problem??
Accommodative in facility
If your patient fails on minus or plus binocularly what do you expect?
NRA and/or PRA will be low
Which is easier to train with BV? A NFV or a PFV deficiency
An NFV deficiency
What is easier to train? a NFV or a PFV deficiency?
a patient with NFV is harder to train
If the AC/C ratio what would be your treatment plan
Prims and VT are possibilities but NOT LENSES!
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?
Lenses not a good choice because of low AC/A
Use a BO prism for training
Use a BI prism at near for prescribing
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?
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!
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?
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!
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?
Lenses good choice! high AC/C (over minus at distance)
BO prism for training
prescribe BI prism but watch the near vision
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?
Lenses good choice if normal or high AC/C (over minus)
BO prism for training
prescribe BI prism
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?
Lenses good choice if normal or high AC/C
BI prism for training (difficult)
prescribe BO prism
Presbyopes are harder to graph. What will their results show?
increased exo at near
increased BI prism and decreased BO prism
Decreased PRA
You should only over minus a patient when for BV problems when ...
a patient has high AC/C and adequte amps
What is the best way to prescribe a vertical prism?
Using vectographic data
What are some of the ways Sheards is a better method than Percivals?
Better at distance
More Strict than Percivals
Can Apply to verticals
What are some of the down falls of the Sheards method?
Low Esos and High Exos may still have problems even though they pass Sheards
Doesn't consider Narrow Range
What are some of the advantages of Percival's over Sheards?
Works better at near than Distance
What are some of of the down falls of the Percival method?
Not useful with small zone width
large phoria could still have a problem even when meeting Percival's criteria. Not good at distance