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Methods BLOCK 7 > Moore Qs > Flashcards

Moore Qs Flashcards

1
Q

How many layers in the endothelium

A

350,000 to 500,000

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2
Q

How many layers to the endothelium

A

1

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3
Q

How often do endothelial layers regenerated

A

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

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4
Q

How many people have high order abberations

A

10%

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5
Q

How does the thickness of the ONH go

A

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

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6
Q

What are the 3 main things that mean glaucoma

A
  • high pressure
  • cupping
  • VF loss
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7
Q

What is the average corneal thickness

A

535-565

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8
Q

IOP in thin corneas

A

Underestimated

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9
Q

IOP in thick corneas

A

Overestimated

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10
Q

Where is the cornea thinnest

A

Apex

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11
Q

Does the corneal thickness change with age

A

No

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12
Q

When is the cornea thicker

A

Upon awakening

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13
Q

What are the 2 types of A scan

A
  • Emersion
  • dry

Use Emersion for IOL calculations because it is more accurate)

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14
Q

What are the two different types of glasses

A

Compensatory and corrective

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15
Q

What is the difference between compensatory and corrective glasses

A

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.

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16
Q

What doe sepcular biomicroscopy look for

A

Endothelium of cornea

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17
Q

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

A

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
Q

How many cells thick is the endothelium

A

1 cell thick

19
Q

How many cells are in the corneal endothelium

A

350,000-500,000

20
Q

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

A

Shape, number, density, variety

21
Q

What do you look at with OCT

A 
Macula
ONH
Cornea 
Angles
Anything you can see with indirect ophthalmoscope or slit lamp, OCT can look at
22
Q

What does pachymetry do

A

Measures thickness

-CCT

23
Q

What is the average CCT

A

540-560

24
Q

Where can you measure with pachymetry?

A

Anywhere on the cornea

25
Q

What can you use for posterior segment imaging

A 
Camera 
OCT
Optic nerve analyzers
A scan
B scan
26
Q

What s the difference between monofilament and multifilament sutures

A

Monofilament is slick, needs multiple knots

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

27
Q

What is the difference between synthetic and natural sutures

A

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

Natural will degrade over time

28
Q

Difference between absorbable and nonabsorbalble sutures

A

Absorbable can be dissolved

Nonabsorbalbe will not be dissolved

29
Q

Single suture technique

A

One knot

30
Q

Mattress suture technique

A

Horizontal parallel to incision

Vertical perpendicular to incision

31
Q

Why do you use nondominant hand to hold the needle driver?

A

So you can tie knots with the nondominant hand

-grab loose end of suture and pull it through

32
Q

Which is larger, 3 or 3.0?

A

3

33
Q

1.0, 2.0, 3.0

Is this sequence getting larger or smaller?

A

Smaller

Think of .0 as a negative sign

34
Q

1,2,3

Is this sequence getting larger or smaller?

A

Larger

35
Q

What is A scan used for

A

Axial length, ACD, lens thickness, VCD, not pachymetry

36
Q

Can you measure CCT with A scan

A

No

37
Q

What is B scan used for

A

The structure of the eye and adnexa

  • ONH
  • EOMs
  • Lens
  • retinal detachments
  • orbital space tumor
38
Q

Difference between compensatory and corrective lenses

A

Compensatory lenses do not fix anything, you need them all the time and you will always need them

Corrective lenses will eventually fix the problem to where you do not need them eventually

39
Q

Which laser technique has a flap

A

LASIK

40
Q

What do you do instead of make a flap in PRK

A

Remove corneal epithelium

41
Q

What laser technique do you use for someone with thin corneas

A

PRK

42
Q

What laser techniques for glaucoma

A

YAG and SLT

Methods BLOCK 7 (4 decks)

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