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Eye examination with the aid of a slit lamp. Side view of a slit lamp machine. Cataract in human eye: magnified view seen on examination with the slit lamp. 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 a characterized by a breakdown or damage of the epithelium of the cornea in a pinpoint pattern, which can be seen with examination with a slit-lamp. Patients may present with non-specific symptoms such as red eye, tearing, foreign body sensation, photophobia and burning.
Common findings on anterior segment slit lamp examination include increased cell and flare with associated fibrin and possible hypopyon formation. Patients may show signs of diffuse corneal edema , and they may also show signs of iris atrophy with pupillary abnormalities and eventual increased intraocular pressure.
Slit Lamp Examination The slit lamp also allows inspection of all the ocular media, from cornea to vitreous, plus magnified view of eyelids, and other external ocular related structures. Fluorescein staining of the tear film before slit lamp examination may reveal etiologies of the surface of the eye, such as corneal abrasions or keratitis due ...
Corneal abnormalities including edema or opacities ("corneal haze") Corneal staining; Pupil abormalities including abormal pupil size; Abnormal intraocular pressure; Severe pain; The most useful is a smaller pupil in the red eye than the non-red eye (opposite eye) and sensitivity to bright light. [2]
On slit-lamp examination, conjunctival injections, epithelial corneal edema, [3] small to medium-sized fine keratitic precipitates, aqueous cells and flare may also be noted. [4] Blurring of vision, eye pain and discomfort are the main symptoms. [4] Colored halos may occur due to elevated IOP. [5]
Diagnosis is often by slit lamp examination after fluorescein dye has been applied. [1] More significant injuries like a corneal ulcer, globe rupture, recurrent erosion syndrome, and a foreign body within the eye should be ruled out. [1] Prevention includes the use of eye protection. [1] Treatment is typically with antibiotic ointment. [1]
This image is of the angle of the eye as seen through a slit lamp. It is labelled as Grade 4 according to Van Herick's Grading system. The Van Herick's technique compares the depth of the peripheral anterior chamber with the cornea thickness, usually written as a fraction [ 6 ] however, it can also be expressed as a ratio (see table 3). [ 5 ]