lecture 9 applanation tonometry troubleshooting Flashcards

1
Q

between the tonopen and tonopen XL, which is the one that you need to calibrate regularly by holding up and down

A

tonopen XL

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2
Q

Both proparacaine and benoxinate have an onset of ____ and a duration of _____

A

15sec, 15minutes

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3
Q

(T or F) A “toemark” is a serious injury

A

false, but if you left a toe mark you could give the pt some artificial tears

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4
Q

(T or F) Hand held Perkins contains a doubling prism and acts similarly to Goldman tonometry.

A

true

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5
Q

If pt is allergic to novocaine, is it safe to use proparacaine?

A

YES

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6
Q

After GAT when do you recommend pt’s to wear their CL’s?

A

30-60 minutes

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7
Q

How do you ensure GAT probe is perpendicular to the cornea surface?

A

by offsetting mounting arm angle

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8
Q

what are the 3 basic components of the applanation tonometer 900?

A

1) probe 2) spring loaded probe holder 3) measuring drum

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9
Q

What is the area of central cornea applanation?

A) 4.25mm2
B) 5.35mm2
C) 6.55mm2
D) 7.35mm2

A

D) 7.35mm2

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10
Q

If you turn the GAT drum toward the patient, the semicircles get:

A) smaller
B) larger
C) closer
D) farther

A

C) closer

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11
Q

Your pt has small eyes and you are having difficulty performing tonometry. You try to lift the upper lid. What do you need to be careful of?

A

do not apply pressure on the globe while doing this, it will affect your IOP reading

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12
Q

An asymmetrical IOP reading between the 2 eyes is a difference of ______ mmHg or greater

A

3mmHg, repeat GAT if this happens

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