lecture 8 tonometry Flashcards Preview

PPO4 final > lecture 8 tonometry > Flashcards

Flashcards in lecture 8 tonometry Deck (21)
Loading flashcards...
1

aqueous humor is produced by_____ and controlled by _____

posterior chamber, carbonic anhydrase

2

glaucoma therapy focuses on which 2 mechanisms of increased IOP?

increasing outflow and inhibition of production

3

what are the 2 aqueous humor outflow routes?

trabecular (70%), uveoscleral (30%)

4

Do prostaglandins effect outflow or production of aqueous humor?

outflow

5

what is the MOST SIGNIFICANT factor in the etiology of increased IOP?

interference with aqueous outflow

6

(T or F) Non-contact tonometry (nct) is considered applanation tonometry?

true

7

(T or F) With applantation tonomtery, repeated reading will change IOP

false, however, with indention tonometry repeated reading would increase IOP

8

The avg corneal thickness is______

520 microns

9

diameter of applanation is______

3.06mm

10

area of applanation is_______

7.35mm

11

what is the "gold standard" of tonometry

goldmann tonometry

12

On the goldmann tonometry dial, each small mark is equal to ____

2mmHg

13

name 3 types of common diagnostic agents

anesthetics, cycloplegics, mydriatics

14

(T or F) patients may have a cross-sensitivity to Fluress if they have ever had an adverse reaction to novocaine

true

15

(T or F) patients may have a cross-sensitivity to proparacaine if they have ever had an adverse reaction to novocaine

false, if they are allergic to novocaine they will have cross sensitivity to fluress and proparacaine would be the alternative for that patient

16

On the Haag streit AT900, what does A and O mean

A=astigmatism, O=sphere

17

For the goldman tonometry, if K cyl is >4.00D, then measurement must be made ____ degrees from the meridian of thhe lower power

43 degrees

18

what is the separation in degrees of the white and red lines on the Goldmann tonometer?

43 degrees

19

To set up for goldmann tonometry:polarized filter is ____, mag is _____, illuminaion is ____

off, 10x-16x, high

20

Why do you want to put the sit lamp system arm at 5-10 degrees?

so you can click in goldmanns probe so that it will be perpendicular with the corneal plane

21

pulsating mires is caused by what?

venous pulsation causing lateral motion of mires. if mires come and go this is not pulsating mires, this means you have not adequately applanated the cornea