<unk> is used to help in the diagnosis of a number of eye problems. When applied as a drop or within a strip of paper to the surface of the eye it is used to help detect eye injuries such as foreign bodies and corneal abrasions. When given by mouth or injection into a vein it is used to help evaluate the blood vessels in the back of the eye during<unk> angiography. 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. 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. Allergic reactions may rarely occur.<unk> is a dye which is taken up by damaged cornea such that the area appears green under cobalt blue light. There is also a version that comes premixed with lidocaine.<unk> was first made in 1871. It is on the World Health Organization's List of Essential Medicines.
Fluorescein 
Anisodamine
Orellanine
Cyanoacrylate
Coricidin
Phthalate
Diatrizoate
Azo dye