Slit Lamp Flashcards
High power binocular microscope with a slit-shaped illumination source, specifically designed for viewing the different optically transparent or translucent tissues of the eye
Slit lamp biomicroscope
What is significant about the view you get in biomicroscopy
Depth perception
The science of examination with a slit lamp that allows in vivo study of living tissues at high mag
Biomicroscopy
Who invented the first slit lamp and when
Gullstrand
1911 (Zeiss)
What are the two industry standard slit lamps
Zeiss
Haag-streit
What is the main difference between the zeiss and the Haag-streit type
The illumination system
In the zeiss type, the illumination comes from
Below
In the haag streit type the illumination comes from
Above
Hand held slit lamps good for
Handicapped patients
Infants
Bed bound patients
What type of illumination used in both zeiss and Haag
Koehler illumination
What kind of system does eyepiece use
Astronomical telescope
What is used for even higher and changeable magnification
Galilean telescope
What is used to change mag
Galilean system
What do the telescope systems produce
Inverse image
What is used to produce a right way erect image
Porro-abbe
The point at which the microscope is focused corresponded to the point on which the light is focused
Parfocality
3 basic parts of slit lamp
- Motorized table
- Patient positioning frame
- Joystick
What does high mag do to FOV
Decreases
What does low mag do to FOV
Increased
Clinical uses of biomicroscopy
- gold standard for assessment of the anteiror seg
- exam of ocular structures
- auxiliary lenses for post seg
What are the most important illumination methods for biomicroscopy?
- direct illumination
- specular reflection
- retro-illumination
What type of illumination allows you to see the endothelium of cornea
Specular reflection
What kind of retro illumination is most commonly used
Iris transillumination
Types of direct illumination
- direct diffuse illumination
- direct focal illumination
- parallelepiped
- optic section
- conical beam
