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Slit Lamp Techniques > Slit Lamp Examinations > Flashcards

Slit Lamp Examinations Flashcards

1
Q

Diffuse Illumination

A

Illumination: Low
Illumination Angle: 30-45
Slit width: MAX
Slit Height: MAX
Magnification: 6.4x - 10x

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2
Q

Optic section

A

Illumination: Medium to High
Illumination Angle: 45
Slit width: <2 mm
Slit Height: MAX
Magnification: 16- 25x

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3
Q

Parallelpiped

A

Illumination: Low to Medium
Illumination Angle: 45
Slit width: 2-3mm
Slit Height: MAX
Magnification: 10 -25x

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4
Q

Conical beam

A

Illumination: High
Illumination Angle: 40-60
Slit width: <2mm
Slit Height: <2mm
Magnification: 16 -25x

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5
Q

Specular Reflection

A

Illumination: Low
Illumination Angle: 30 (30 Observation Arm)
Slit width: <2mm
Slit Height: MAX
Magnification: 16-40x

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6
Q

Tangential

A

Illumination:High
Illumination Angle: 75-90
Slit width: 2-3mm / same as parallelpiped
Slit Height: MAX
Magnification: 6.4x

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7
Q

Retro illumination from Iris

A

Illumination: Medium
Illumination Angle: 45
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 16-40x

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8
Q

Retro illumination from Iris

A

Illumination: Medium
Illumination Angle: 45
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 16-40x

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9
Q

Retroillumination from fundus

A

Illumination: Medium to High
Illumination Angle: 0-10
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 10x

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10
Q

Retroillumination from fundus

A

Illumination: Low to Medium
Illumination Angle: 0-10
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 10x

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11
Q

Sclerotic Scatter

A

Illumination: Medium - High
Illumination Angle: 45- 60
Slit width: <2mm
Slit Height: MAX
Magnification: 6.4x -10x

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12
Q

Van Herick Technique

A

Illumination: Medium - High
Illumination Angle: 60
Slit width: <2mm
Slit Height: MAX
Magnification: 6.4- 10x

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13
Q

What is the purpose of slit lamp biomicroscopy?

A

To diagnose eye conditions and evaluate the health of the anterior segment of the eye.

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14
Q

What is the purpose of the slit lamp biomicroscopy?

A

To diagnose eye conditions and evaluate the health of the anterior segment of the eye.

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15
Q

The slit lamp biomicroscope is consists of 3 systems. Name and their purpose

A

Illumination system - it sends the light into the patients eye.

Observation system - allows the observer to see the magnified structures.

Mechanical system - positioning and adjustment of patient and observer.

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16
Q

What is the magnification range provided by most slit lamps?

A

6x to 40x

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17
Q

What slit lamp biomicroscope has the light source located below the level of the slit?

A

Zeiss Slit lamp Biomicroscope

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18
Q

What is the principle is used in the illumination system of both Zeiss and Haag streit slit lamps

A

Kohler illumination principle

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19
Q

What is the purpose of the cobalt blue filter in slit lamp

A

Enhances the view of fluorescein dye in the tear film

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20
Q

What is the purpose of the green filter (Red free filter)

A

Enhances the view of blood vessels and hemmorhage

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21
Q

Normal endothelial shape

A

Hexagonal

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22
Q

Slit width for optic section illumination

A

<2mm

23
Q

Slit height for retroillumination

A

4-5mm

24
Q

Magnification for tangential illumination

A

6.4x

25
Q

Illumination angle for specular reflection

A

30 (30 Observation Arm)

26
Q

Purpose of indirect illumination

A

Provides a dark background allowing corneal opacities to be viewed with more contrast.

27
Q

Purpose of sclerotic scatter

A

To highlight pathology by absorbing and scattering light through the cornea.

28
Q

Normal TBUT

A

10-15 seconds

29
Q

Purpose of Van Herick Texhnique

A

To evaluate the anterior chamber without gonioscopy.

30
Q

What do you call when there’s a formation of small new blood vessels?

A

Neovascularization

31
Q

What Illumination technique gives a good overall picture of the eye, but no fine details. It is the general survey of the eye.

A

Diffuse illumination

32
Q

What are the structures you are observing in the parallel piped illumination?

A

Cornea, Iris, Lens

33
Q

What illumination technique will you use if you want to examine the anterior chamber for flares, inflammatory cells, or floating particles?

A

Conical Beam

34
Q

Illumination angle for diffuse illumination?

A

30-45

35
Q

Slit width for parallel piped

A

2-3mm

36
Q

Magnification range for optic section illumination

A

16-25x

37
Q

Condition is typically examined using the conical beam technique?

A

Anterior uveitis

38
Q

Illumination for specular reflection

A

Low

39
Q

Normal shape of endothelial cells

A

Hexagonal

40
Q

What is polymegethism

A

Variation in size of endothelial cells

41
Q

Where are guttata typically found

A

Central cornea

42
Q

What is the common indication of aging in the cornea

A

Hassall- Henle bodies

43
Q

What is the illumination angle for tangential illumination

A

75-90

44
Q

Slit height for retro illumination from the iris

A

4-5mm

45
Q

Difference between anterior uveitis and closed angle attack regarding keratic precipitates

A

Present in anterior uveitis, absent in closed angle attack

46
Q

Slit width is used for retroillumination from the fundus

A

<2mm

47
Q

What optical principle does sclerotic scatter utilize?

A

Total Internal Reflection

48
Q

What is the appearance of leucoma

A

White

49
Q

Illumination angle for Van Herick Technique

A

60

50
Q

Magnification range of sclerotic scatter

A

6.4-10x

51
Q

Primary use of the parallel piped technique

A

General examination

52
Q

Illumination level of conical beam

A

High

53
Q

Optic section technique help visualize

A

A section of a structure without cutting it

Slit Lamp Techniques (1 decks)

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