BY RAIN HEALTH CARE

1. Slit lamp

2. HAAG ZEISS
TOPCON

3. BASICS
What are the three systems present in a slit lamp ?
OBSERVATION SYSTEM ILLUMINATION SYSTEM MECHANICAL SYSTEM

5. Observation system

6. Illumination system

7. Mechanical system

8. Illumination techniques
DIFFUSE DIRECT

9. DIFFUSE ILLUMINATIoN
 Light is spread evenly over the entire observed surface
 The beam is completely open
 The light is directed on the eye at 45 º angle
 The microscope is directed straight ahead
 The structures observed are: eyelids, eyelashes, conjunctiva, sclera, pattern of redness, iris,
pupil, gross pathology and media opacities

10. Optic section
 A narrow focal slit beam is projected at a 45-60˚ angle
 It cuts an optical section through the cornea like a knife
 With this technique it is possible to locate the layer of the pathological changes
 Magnification approximately 10X
 Width: Narrow slit 1mm

11. Parallelepiped
 Default method of corneal evaluation
 Cornea is focusses obliquely in order to obtain a quadrilateral block of lght illuminating the cornea
 Beam about 2 mm width
 Medium to High magnification (10-25x)
 Can be used to examine corneal surface or stroma
 For ascertaining the depth of abrasion or foreign body

12. Conical beam
 Slit lamp is adjusted to smallest circular beam
 Projected at an angle of 42-90º through the anterior chamber
 The strongest reflection is possible at 90 º
 Used to visualize cells, flares, proteins or intra ocular foreign body

13. SCLEROTIC SCATTER
 A tall wide beam is directed onto the limbal area
 When the light is properly aligned with regard to the eye, a ring of light will appear around the cornea
 The light is absorbed and scattered through the cornea highlighting the pathology
 10x magnification is usually used
 Corneal edema, opacities,infiltrates, foreign bodies

22. THANKS FOR WATCHING