Slit Lamp Examinations Flashcards
Diffuse Illumination
Illumination: Low
Illumination Angle: 30-45
Slit width: MAX
Slit Height: MAX
Magnification: 6.4x - 10x
Optic section
Illumination: Medium to High
Illumination Angle: 45
Slit width: <2 mm
Slit Height: MAX
Magnification: 16- 25x
Parallelpiped
Illumination: Low to Medium
Illumination Angle: 45
Slit width: 2-3mm
Slit Height: MAX
Magnification: 10 -25x
Conical beam
Illumination: High
Illumination Angle: 40-60
Slit width: <2mm
Slit Height: <2mm
Magnification: 16 -25x
Specular Reflection
Illumination: Low
Illumination Angle: 30 (30 Observation Arm)
Slit width: <2mm
Slit Height: MAX
Magnification: 16-40x
Tangential
Illumination:High
Illumination Angle: 75-90
Slit width: 2-3mm / same as parallelpiped
Slit Height: MAX
Magnification: 6.4x
Retro illumination from Iris
Illumination: Medium
Illumination Angle: 45
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 16-40x
Retro illumination from Iris
Illumination: Medium
Illumination Angle: 45
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 16-40x
Retroillumination from fundus
Illumination: Medium to High
Illumination Angle: 0-10
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 10x
Retroillumination from fundus
Illumination: Low to Medium
Illumination Angle: 0-10
Slit width: <2mm
Slit Height: 4-5mm
Magnification: 10x
Sclerotic Scatter
Illumination: Medium - High
Illumination Angle: 45- 60
Slit width: <2mm
Slit Height: MAX
Magnification: 6.4x -10x
Van Herick Technique
Illumination: Medium - High
Illumination Angle: 60
Slit width: <2mm
Slit Height: MAX
Magnification: 6.4- 10x
What is the purpose of slit lamp biomicroscopy?
To diagnose eye conditions and evaluate the health of the anterior segment of the eye.
What is the purpose of the slit lamp biomicroscopy?
To diagnose eye conditions and evaluate the health of the anterior segment of the eye.
The slit lamp biomicroscope is consists of 3 systems. Name and their purpose
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.
What is the magnification range provided by most slit lamps?
6x to 40x
What slit lamp biomicroscope has the light source located below the level of the slit?
Zeiss Slit lamp Biomicroscope
What is the principle is used in the illumination system of both Zeiss and Haag streit slit lamps
Kohler illumination principle
What is the purpose of the cobalt blue filter in slit lamp
Enhances the view of fluorescein dye in the tear film
What is the purpose of the green filter (Red free filter)
Enhances the view of blood vessels and hemmorhage
Normal endothelial shape
Hexagonal