Ad
related to: fluorescein eye stain test
Search results
Results from the WOW.Com Content Network
Fluorescein is a dye which is taken up by damaged cornea such that the area appears green under cobalt blue light. [3] There is also a version that comes premixed with lidocaine. [4] [8] Fluorescein was first made in 1871. [9] It is on the World Health Organization's List of Essential Medicines. [10]
The fluorescein is examined with a cobalt blue filter. At this point, the fluorescein appears green in color. Any changes in color or surface of the fluorescence area indicate the presence of corneal leakage. The test is contraindicated in obvious globe rupture, Full-thickness eye laceration, and fluorescein hypersensitivity. [1]
Fluorescein is a fluorophore commonly used in microscopy, in a type of dye laser as the gain medium, in forensics and serology to detect latent blood stains, and in dye tracing. Fluorescein has an absorption maximum at 494 nm and emission maximum of 512 nm (in water).
The fluorescein is administered intravenously in intravenous fluorescein angiography (IVFA) and orally in oral fluorescein angiography (OFA). The test is a dye tracing method. The fluorescein dye also reappears in the patient urine, causing the urine to appear darker, and sometimes orange. [2] It can also cause discolouration of the saliva.
Fluorescein 2% [2] is instilled into the lower fornix of patient's eye. Alternatively, impregnated fluorescein strip moistened with preservative (benzalkonium chloride) free saline solution can also be used. [6] The eye is examined under a slit lamp with a low magnification and a broad beam covering the whole cornea. The lamp is switched to a ...
Another test involves fluorescein eye drops, which contain a dye that is placed in the eye. The dye should drain with the tears through the lacrimal duct into the nose within 2 minutes. If patients do not have enough tears to flush the dye into the nose, this time will be longer. A new test is also available to more accurately measure the flow ...
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]
A fine strip of paper, stained with fluorescein, a fluorescent dye, may be touched to the side of the eye; this stains the tear film on the surface of the eye to aid examination. The dye is naturally rinsed out of the eye by tears. A subsequent test may involve placing drops in the eye in order to dilate the pupils. The drops take about 15 to ...
Ad
related to: fluorescein eye stain test