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Flashcards in Moore Qs Deck (42)
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1

How many layers in the endothelium

350,000 to 500,000

2

How many layers to the endothelium

1

3

How often do endothelial layers regenerated

They don't. Epithelium regenerates every 30 days, but endothelium does not

4

How many people have high order abberations

10%

5

How does the thickness of the ONH go

Follows the ISNT rule
I should be largest number
T should be smallest number

6

What are the 3 main things that mean glaucoma

-high pressure
-cupping
-VF loss

7

What is the average corneal thickness

535-565

8

IOP in thin corneas

Underestimated

9

IOP in thick corneas

Overestimated

10

Where is the cornea thinnest

Apex

11

Does the corneal thickness change with age

No

12

When is the cornea thicker

Upon awakening

13

What are the 2 types of A scan

-Emersion
-dry

Use Emersion for IOL calculations because it is more accurate)

14

What are the two different types of glasses

Compensatory and corrective

15

What is the difference between compensatory and corrective glasses

Compensatory are glasses that compensate for a problem that cannot be fixed, the only way to correct someone's vision is with these glasses

Corrective is like a cast on a broken arm. Hopefully they will correct pt to 20/20 and then from that point you can decide if you need to use them all the time.

16

What doe sepcular biomicroscopy look for

Endothelium of cornea

17

What are the shapes of the endothelial cells of the cornea and why is that important

Hexagonal, when you have loss of these cells they will be less hexagonal. You can lose some with age, but they will not regenerate

18

How many cells thick is the endothelium

1 cell thick

19

How many cells are in the corneal endothelium

350,000-500,000

20

What do you look for when you look at the corneal endothelium

Shape, number, density, variety

21

What do you look at with OCT

Macula
ONH
Cornea
Angles
Anything you can see with indirect ophthalmoscope or slit lamp, OCT can look at

22

What does pachymetry do

Measures thickness
-CCT

23

What is the average CCT

540-560

24

Where can you measure with pachymetry?

Anywhere on the cornea

25

What can you use for posterior segment imaging

Camera
OCT
Optic nerve analyzers
A scan
B scan

26

What s the difference between monofilament and multifilament sutures

Monofilament is slick, needs multiple knots

Multifilament
Only need one knot, because it has better traction, wont slip in the tissue as well

27

What is the difference between synthetic and natural sutures

Synthetic will not degrade in eye, want this in the eye

Natural will degrade over time

28

Difference between absorbable and nonabsorbalble sutures

Absorbable can be dissolved

Nonabsorbalbe will not be dissolved

29

Single suture technique

One knot

30

Mattress suture technique

Horizontal parallel to incision
Vertical perpendicular to incision