Slit lamp
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The document discusses the slit lamp biomicroscope, which is an important tool used to examine the anterior segment of the eye. It works on the same principle as a compound microscope, with an objective lens facing the patient and an eyepiece facing the examiner. There are different types of slit lamps produced by Zeiss and Haag Streit. Examination involves properly positioning the patient and adjusting the instrument, then using various illumination methods like diffuse, direct, and retro illumination to view the different structures of the anterior eye segment. The slit lamp is used for both diagnostic evaluation of ocular diseases and performing procedures.
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Lasers in ophthalmology
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Entoptic phenomena
This document discusses various entoptic phenomena, or visual perceptions caused by structures within the eye itself. It begins by introducing entoptic images and noting they cannot be photographed. It then discusses 8 specific entoptic phenomena in detail: 1) the corneal mosaic seen with a pinhole, 2) physiologic halos from the cornea, 3) vitreous floaters in the vitreous, 4) retinal phosphenes from pressure on the retina, 5) the Purkinje tree of retinal vessels seen with slit lamp, 6) flying spots thought to be white blood cells, 7) blue retinal arcs from the nerve fiber layer, and 8) Haidinger's brush seen with a polarized filter related
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The slit lamp is an instrument used to examine the outer eye that consists of a binocular microscope linked to an adjustable light source, allowing magnification and illumination of eye structures. It facilitates examination of the eyelids, cornea, iris, and other anterior eye structures through different lighting techniques. The slit lamp is an important tool in ophthalmic diagnosis, procedures such as intraocular pressure measurement, and therapies like laser treatment.
slit lamp photography.pdf
This document provides information about slit lamp photography and specular microscopy. It discusses the components and uses of the slit lamp biomicroscope for anterior segment examination and photography. Specific illumination techniques are described including diffuse, direct focal, retroillumination, and optical section illumination. Guidelines for using the photo slit lamp and orienting the camera are provided. Specular microscopy is introduced as a technique for visualizing and analyzing the corneal endothelium using non-contact or contact specular microscopes. Applications of specular microscopy include evaluating patients for cataract surgery and corneal transplantation.
Slit lamp
for eye care professionals.. will help them to understand slit lamp examination based on theory can co-relate with the practicals to gain more knowledge
Slit lamp
The slit lamp is an instrument used to examine the anterior segment of the eye. It provides stereoscopic, magnified views through illumination and observation systems. It is used for detailed examination of the cornea, anterior chamber, iris, and retina. The slit lamp allows for measurement of intraocular pressure and delivery of laser treatments. Examination techniques include diffuse, direct, indirect, and retroillumination to visualize different ocular structures.
Indirect Ophthalmoscopy .pptx
Indirect ophthalmoscopy allows examination of the retina using an inverted magnified image. A strong convex lens is placed near the eye to make the eye highly myopic. This brings light from the retina to a focused real image between the lens and observer. The image size and position depends on the eye's refractive error - it is at the lens focus for emmetropia, in front for myopia, and behind for hyperopia. Indirect ophthalmoscopy provides a large field of view useful for retinal pathology assessment and laser treatment. Though difficult to learn, it allows examination of peripheral retina and is useful in media opacity.
Indirect ophthalmoscopy
Indirect ophthalmoscopy has evolved since its introduction in the 1850s to become an indispensable tool for examining the retina. It allows examination of the peripheral retina through the use of a condensing lens held close to the eye. The observer views an enlarged, inverted image of the retina. Several advantages include the ability to compensate for a patient's refractive error, good illumination, and use with scleral indentation to examine the far periphery. Adjustments of the lens diopter and observation distance allow viewing different areas of the retina with varying magnification and field of view. Proper technique involves adjusting the headband-mounted binocular scope and positioning the condensing lens.
what is slit lamp Biomicroscopy | What is a slit lamp exam used for? |Differe...
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Slit lamp evaluation
The document provides details about slit lamp biomicroscopy. It describes the slit lamp as an important examination tool that allows ophthalmologists to examine the eye in 3 dimensions. The key components of a slit lamp are the observation system (microscope), illumination system, and mechanical support system. The microscope provides stereoscopic viewing and variable magnification. The illumination system provides a focused slit of light using a light source, lenses, slit and filters. The mechanical system allows positioning of the patient and adjustment of the microscope and illumination.
Slit lamp biomicroscopy
all about slit lamp. special features, basic designs, principal of observation system, principal of illumination, animations are done for the beginners for easy understanding,pitfalls.
Slit lamp examination
The document discusses the slit lamp biomicroscope, its components, uses, and techniques. It describes:
- The history and development of the slit lamp from the 1860s to present.
- The main components including the viewing arm, biomicroscope, illumination arm, and controls for slit size, shape, filters and intensity.
- Common techniques like varying slit width and lamp angle to illuminate different tissue depths and structures.
- Methods of illumination including direct, indirect, retro-illumination and their uses in examining different anterior segment structures.
SLIT LAMP BIOMICROSCOPE MOPB 021.pptx
The document describes the slit lamp biomicroscope, an instrument used to examine the anterior segment of the eye. It consists of an illumination system that produces a focused beam of light, an observation system using a microscope, and a mechanical system to support the patient and control the device. Various techniques can be used like diffuse illumination, retroillumination and vital staining to examine different ocular structures. Proper maintenance of the device is important to ensure optimal performance.
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Slit lamp
- 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