Lissamine Green strips works by staining the cornea blue upon instillation. This causes ‘speckling’ of the cornea, which gives the doctor immediate indication of any dry patches as well as any muco-deficient or damaged corneal cells. Most importantly, it does not sting the eye like Rose Bengal and a while light or blue light can be used on the slit lamp during examination. Lissamine Green strips are used for diagnosing muco-deficient or damaged corneal cells and is also used to demonstrate ocular surface changes associated with insufficient tear flow and excessive dryness.