In ophthalmology and optometry, a slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye. It is used in conjunction with a biomicroscope. The lamp facilitates an examination of the anterior segment and posterior segment of the human eye, which includes the eyelid, sclera, conjunctiva, iris, natural crystalline lens, and cornea. The binocular slit-lamp examination provides a stereoscopic magnified view of the eye structures in detail, enabling anatomical diagnoses to be made for a variety of eye conditions. A second, hand-held lens is used to examine the retina.
Two conflicting trends emerged in the development of the slit lamp. One trend originated from clinical research and aimed to apply the increasingly complex and advanced technology of the time. The second trend originated from ophthalmologic practice and aimed at technical perfection and a restriction to useful methods. The first man credited with developments in this field was Hermann von Helmholtz (1850) when he invented the ophthalmoscope.
In ophthalmology and optometry, the instrument is called a "slit lamp", although it is more correctly called a "slit lamp instrument". Today's instrument is a combination of two separate developments, the corneal microscope and the slit lamp itself. The first concept of a slit lamp dates back to 1911 credited to Allvar Gullstrand and his "large reflection-free ophthalmoscope." The instrument was manufactured by Zeiss and consisted of a special illuminator connected to a small stand base through a vertical adjustable column. The base was able to move freely on a glass plate. The illuminator employed a Nernst glower which was later converted into a slit through a simple optical system. However, the instrument never received much attention and the term "slit lamp" did not appear in any literature again until 1914.
It was not until 1919 that several improvements were made to the Gullstrand slit lamp made by Vogt Henker.
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In ophthalmology and optometry, a slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye. It is used in conjunction with a biomicroscope. The lamp facilitates an examination of the anterior segment and posterior segment of the human eye, which includes the eyelid, sclera, conjunctiva, iris, natural crystalline lens, and cornea. The binocular slit-lamp examination provides a stereoscopic magnified view of the eye structures in detail, enabling anatomical diagnoses to be made for a variety of eye conditions.
Le rétinographe est l’appellation française de la Fundus camera des Anglo-saxons ; cet appareil sert à photographier le fond d'œil, soit tout ce qui est visible en arrière de l'iris et du cristallin. On peut y observer la rétine, la papille optique, la macula, l'ensemble portant le nom de pôle postérieur. vignette|upright=2|Rétinographe non-mydriatique Le rétinographe est utilisé pour surveiller d'éventuelles modifications du fond d'œil, pour transmettre des images à un ophtalmologiste distant ou réaliser des assemblages couvrant une grande surface de la rétine.
Corneal abrasion is a scratch to the surface of the cornea of the eye. Symptoms include pain, redness, light sensitivity, and a feeling like a foreign body is in the eye. Most people recover completely within three days. Most cases are due to minor trauma to the eye such as that which can occur with contact lens use or from fingernails. About 25% of cases occur at work. Diagnosis is often by slit lamp examination after fluorescein dye has been applied.
Explore l'interférence des ondes électromagnétiques et la formation d'ondes debout, illustrant comment l'énergie des vagues est modulée spatialement par l'interférence.
Couvre les concepts fondamentaux de la microscopie, expliquant le besoin de grossissement au-delà de l'œil humain et introduisant des techniques d'imagerie avancées.