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Rose bengal solid and solution in water. Rose bengal (4,5,6,7-tetrachloro-2',4',5',7'-tetraiodofluorescein) is a stain. Rose bengal belongs to the class of organic compounds called xanthenes. [1] Its sodium salt is commonly used in eye drops to stain damaged conjunctival and corneal cells and thereby identify damage to the eye.
Herpes simplex ulcers show a typical dendritic pattern of staining. Rose-Bengal dye is also used for supra-vital staining purposes, but it may be very irritating to the eyes. In descemetoceles, the Descemet's membrane will bulge forward and after staining will appear as a dark circle with a green boundary, because it does not absorb the stain.
It describes a technique for using a protoplasm stain, Rose bengal, to discriminate between living and dead foraminifera in modern samples. Generations of scientists have used this stain on samples taken from oceans around the world and successfully determined how deep in the sediment living foraminifera were burrowing. The technique has proven ...
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Rose bengal, tetrachloro-tetraiodo-fluorescein used as stain in histology; DyLight Fluor, a product line of fluorescent dyes; Fluorescein diacetate hydrolysis, a biochemistry laboratory test; Other dyes: Rhodamine, family of derivatives of xanthene used as dyes, indicators and fluorescent tracers; Methylene blue, blue thiazine dye also used as ...
When applied to the surface of the eye, side effects may include a brief period of blurry vision and discoloration of contact lenses of the soft type. [ 7 ] [ 3 ] When used by mouth or injection, side effects may include headache, nausea, and a change to the color of the skin for a brief period of time. [ 3 ]
Molecular frameworks most often used as photosensitizers for antimicrobial photodynamic therapy. The examples listed in this figure include: methylene blue (MB, phenothiazine), crystal violet (CV, triarylmethane), porphyrins, phtalocyanines, riboflavin (Vitamin B 2), rose bengal (RB, halogenated xanthene), chlorins and curcumin.
This classic herpetic lesion consists of a linear branching corneal ulcer (dendritic ulcer). During eye exam the defect is examined after staining with fluorescein dye. The underlying cornea has minimal inflammation. Patients with epithelial keratitis complain of foreign-body sensation, light sensitivity, redness and blurred vision.