Recommended
More Related Content
What's hot
What's hot (20)
Similar to Essential Guide to Slit Lamp Biomicroscopy
Similar to Essential Guide to Slit Lamp Biomicroscopy (20)
Recently uploaded
Recently uploaded (20)
Essential Guide to Slit Lamp Biomicroscopy
- 1. SLIT LAMP BIOMICROSCOPE By – Mushahid Raza B.Optom
- 2. Indroduction • SLIT lamp are used in the examination of the anterior segment of the eye . • Slit lamp is most important piece of equipment in the present day ophthalmologist’s armamenterium . • slit lamp biomicroscope was invented by Gullstrand in 1911.
- 3. Optics of slit lamp • It works on the same principle as a compound microscope . • The objective lens is towards the patient , whose eyes form the object. • The eyepiece is +10 to +14 D and it towards the examiner . • The objective lens constis of two plano – convex lenses with their convexities put together providing a composite power of + 22 D.
- 4. Principle A narrow beam of very bright light produced by lamp this beam is focused on to the eyes which is then viewed under magnification with control illumination.
- 5. Types of slit lamp • Zeiss slit lamp biomicroscope • Haag streit slit lamp biomicroscope ZEISS SLIT LAMP BIOMICROSCOPE ➡️
- 6. Haag streit slit lamp
- 7. Parts of slit lamp INSTRUMENTATION 1- observation system [ microscope ] 2- illumination system [ Slit lamp ] 3- mechanical system [ Engineering support ]
- 8. Observation system– • Binocular eyepiece • camera and vedio adapter • Observation tube Machenical system – • forehead rest • Chin rest • Fixation target • Power supply unit • Locking unit
- 9. Illuminationsystem – • lamp nousing unit • Slit width and high control • Neutral density filter • Cobalt Blue filter • Red free filter • Field size control • Diffusion • Prism
- 10. Slit lamp routine • Patient adjustment • Instrument adjustment • Beginning slit lamp examination
- 11. Patient adjustment– Patient should be positioned comfortably in front of the slit lamp and his / her chin resting on the chin rest and forehead opposed to headrest. Instrument adjustment – • the Hight of table housing the slit lamp should be adjust according to patient’s Hight. • The microscope illumination systemshould be aligned to the pt.eye to be examined. • Fixation target should be placed at the required position.
- 12. Beginning slit lamp examination – • Examination should be carried out in semi dark room so that the examiner’s eyes are partially dark adapted to ensure sensitivity to low intensities of light . • Medication like ointments and anesthetics eye drops produce corneal surface disturbance. • There should be a minimum exposure of retina to light .
- 13. Methods of illumination 1> Diffuse illumination 2> Direct illumination 3> Indirect illumination 4> Retro illumination 5> Specular reflection 6> Sclerotic scatter 7> Oscillatory illumination of koeppe
- 14. Diffuse illumination– • A diffuse board beam of light is used and a general view of the anterior segment of the eye is observed. • Approximately 30-45° between light and microscope. Direct illumination – • Observation and illumination system are focused at the same time . • Medium to high illuminationis used here .
- 15. Indirect illumination – • Observation and illumination system are not focused at the same point. • Low , Medium and high illumination is used • 30°-45° angle between light and illumination. Retro- illumination – • The objectiv of interest is illumination by a light reflected from the structure behind it. • Vary angle between light and microscope • Moderate beam used .
- 16. Specular illumination – • Angle of incidence is equal to angle of reflection • 60° angle between light & microscope. Sclerotic scatter – • Illumination of cornea by total internal reflection of a wide angle light source. • The light beam is directed at the limbal region.
- 17. Use of slit lamp biomicroscopy – DIAGNOSTIC – • Anterior & posterior segment disease • Dry eye Procedure – • Applanation • Tear evaluation • Gonioscopy • Contact lens fitting
- 18. Therapeutic – • Foreign body removal • Epilation