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Methods II Block 6 > Slit Lamp > Flashcards

Slit Lamp Flashcards

1
Q

High power binocular microscope with a slit-shaped illumination source, specifically designed for viewing the different optically transparent or translucent tissues of the eye

A

Slit lamp biomicroscope

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2
Q

What is significant about the view you get in biomicroscopy

A

Depth perception

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3
Q

The science of examination with a slit lamp that allows in vivo study of living tissues at high mag

A

Biomicroscopy

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4
Q

Who invented the first slit lamp and when

A

Gullstrand

1911 (Zeiss)

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5
Q

What are the two industry standard slit lamps

A

Zeiss

Haag-streit

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6
Q

What is the main difference between the zeiss and the Haag-streit type

A

The illumination system

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7
Q

In the zeiss type, the illumination comes from

A

Below

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8
Q

In the haag streit type the illumination comes from

A

Above

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9
Q

Hand held slit lamps good for

A

Handicapped patients
Infants
Bed bound patients

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10
Q

What type of illumination used in both zeiss and Haag

A

Koehler illumination

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11
Q

What kind of system does eyepiece use

A

Astronomical telescope

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12
Q

What is used for even higher and changeable magnification

A

Galilean telescope

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13
Q

What is used to change mag

A

Galilean system

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14
Q

What do the telescope systems produce

A

Inverse image

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15
Q

What is used to produce a right way erect image

A

Porro-abbe

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16
Q

The point at which the microscope is focused corresponded to the point on which the light is focused

A

Parfocality

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17
Q

3 basic parts of slit lamp

A
  1. Motorized table
  2. Patient positioning frame
  3. Joystick
18
Q

What does high mag do to FOV

A

Decreases

19
Q

What does low mag do to FOV

A

Increased

20
Q

Clinical uses of biomicroscopy

A
  • gold standard for assessment of the anteiror seg
  • exam of ocular structures
  • auxiliary lenses for post seg
21
Q

What are the most important illumination methods for biomicroscopy?

A
  • direct illumination
  • specular reflection
  • retro-illumination
22
Q

What type of illumination allows you to see the endothelium of cornea

A

Specular reflection

23
Q

What kind of retro illumination is most commonly used

A

Iris transillumination

24
Q

Types of direct illumination

A
  • direct diffuse illumination
  • direct focal illumination
    • parallelepiped
    • optic section
    • conical beam
25
Q

What are the different types of retro illumination

A
  • direct retro-illumination
  • indirect retro-illumination
    • iris tranillumintion
26
Q

What is the most common direct focal illumination

A

Parallelepiped

27
Q

What is the thinnest type of beam for direct focal illumination

A

Optic section

28
Q

Applications of optic section in direct focal illumination

A
  • van herrick
  • depth or elevation of ant seg
  • corneal depth and layers
29
Q

Applications of conical beam (pinpoint) in direct focal illumination

A

Assessment of inflammatory cells, flare, and pigmented cells in anterior chamber

30
Q

What kind of reflection does the angle of incidence have to equal angle of reflection

A

Specular reflection

31
Q

Illumination and mag of specualr reflection

A

High

32
Q

Applications of specular reflection

A

-only technique by whihc one is able to view the endothelial cells of the cornea or the epitheliual cells on the back of the lens

33
Q

Applications of iris transillumiunation

A

Visualization of defects of the pigment layer of the iris

34
Q

What kind of illumination utilizes total internal reflection

A

Sclerotic scatter

35
Q

What is the most common filter used on the biomicroscope

A

Cobalt blue

36
Q

Why do we use cobalt blue filter in slit lamp

A

For dry eyes and for GAT

37
Q

What kind of drops are used with the cobalt blue filter

A

NaFl

38
Q

What are the uses for cobalt blue filter

A
  • corneal abrasion, ulcer
  • GAT
  • TBUT
39
Q

What lighting technique do we used for van herrickes technique

A

The optic section

40
Q

What grade of van herrick is an open angle

A

Grade 4

41
Q

What grade of van herrick is a closed anterior chamber

A

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Methods II Block 6 (8 decks)

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