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Block 6 > Clinical: Slit Lamp 2 > Flashcards

Clinical: Slit Lamp 2 Flashcards

1
Q

What type of illumination is broad, unfocused beam of light directed towards the eye at an angle?

A

Diffuse illumination

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2
Q

Set up for direct illumination:

A

-low magnification
-Illumination arm at 45 degrees
-unfocus the beam of light with the diffuser on the slit lamp

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3
Q

Uses for diffuse illumination:

A

-general assessment of nearly any ocular structure
-good for examining broad areas of

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4
Q

What is illumination where both the beam and microscope are focused in the ams location

A

Direct illumination (focal)

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5
Q

In direct, 6-10x magnification is used to view

A

Adnexa and lids

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6
Q

In direct, 10-16x magnification is used to observe:

A
  • conjunctiva
    -cornea
    -lens
    -anterior vitreous
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7
Q

What can vary depending on the type of direct illumination?

A

Beam height and width

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8
Q

What is the angle of illumination arm for direct illumination?

A

30-60 degrees angle from microscope and beam in click

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9
Q

What are the direct illumination types?

A

-optic section
-parallelepiped
-broad beam
-conical beam

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10
Q

Optic section beam size is..

A

Thin, 1mm wide beam

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11
Q

Which type of direct illumination creates a cross section of the tissue being examined?

A

Optic section

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12
Q

What are the uses for optic section direct illumination?

A

-detailed, layer by layer evaluation
-depth and elevation of tissue
-any tissues, especially conjunctiva, cornea, and lens

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13
Q

What type of direct illumination creates a block of light that illuminates the tissue?

A

Parallelepiped

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14
Q

What size is the parallelepiped beam?

A

2-3mm wide beam

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15
Q

parallelepiped is good for which tissues?

A

Any but especially cornea and crystalline lens

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16
Q

What type of direct illumination is used for examining larger areas of opaque tissue?

A

Broad beam

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17
Q

What is the shape of broad beam?

A

“Wide parallelepiped”, 4-6mm width, full height

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18
Q

What type of direct illumination is used for assessing the anterior chamber for inflammation?

A

Conical beam

19
Q

What is the shape of the conical beam?

A

1-2mm wide, 1-2mm tall
Small, square/rectangular or circular beam

20
Q

What are the goals of the slit lamp exam?

A

-going tissue by tissue
-comprehensive evaluation

22
Q

What is the standard illumination and magnification when setting up an exam?

A

Low mag, bright illumination

23
Q

What illumination type do you use to begin the exam and what does it look like?

A

Direct illumination, 45 degrees angle angle, full height beam, 2-4mm wide, white light, moderate brightness

24
Q

What are three keys for slit lamp exams?

A

-examine all of one eye before moving on
-work anterior to posterior
-always have one hand on joystick and one hand on the illumination arm

25
Q

Illumination for examining lids and lashes?

A

Low-moderate brightness, diffuse or broad beam

26
Q

Do you examine the patients open lashes first or closed lashes?

27
Q

What are you looking at while examining the lower lid and lashes?

A

-Tear meniscus
-lid apposition to the globe
-meibomian gland openings

28
Q

Illumination while looking at conjunctiva and sclera?

A

Low-moderate brightness, broad or diffuse beam

29
Q

While looking at the lower conjunctiva and sclera, what else should you look at?

A

Inferior puncta

30
Q

Illumination for cornea and tear film?

A

Narrow parallelepiped, bright beam

31
Q

magnification for cornea and tear film?

A

Low to medium (10-16X)

32
Q

After observing the cornea and tear film once through you should…

A

Narrow the beam to an optic section and scan the cornea again

33
Q

What technique is used to assess the openness of the AC angle and depth of the anterior chamber?

A

Van herick

34
Q

Magnification and Illumination for assessing the angle and chamber?

A

16x, Optic section, bright light

36
Q

Illumnation for assessing iris?

A

Wide parallelepiped at a 30-45 degrees angle angle

37
Q

Magnification from assessing the iris?

A

Low to medium (10-16x)

38
Q

What are you looking for while assessing the iris?

A

-pupil constriction
-entire iris surface
- iris retro illumination

39
Q

Illumination for assessing crystalline lens?

A

Narrow parallelepiped, beam angle at 30-45 degrees

40
Q

magnifation for assessing the crystalline lens?

41
Q

After veiwing the lens you should go back and…

A

Repeat it with an optic section

42
Q

Illumination for assessing anterior vitreous?

A

Narrow parallelepiped, beam angle at 10-20 degrees

43
Q

Magnification wile assessing the anterior vitreous?

A

Low to medium (10-16x)

44
Q

If your beam width is large, your illumination should be

Block 6 (27 decks)

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