Keratitis is a painful disease that runs the gamut of annoying symptoms. Regardless of the cause, it requires ophthalmologic intervention, as in extreme cases it can result in permanent visual impairment or even loss of vision.

The yellow tufts (Latin: corpora amylacea) are deposits of polysaccharide compounds such as glycogen, proteins, lipids (e.g. cholesterol). They can appear on the body, as well as on internal organs. When they grow on the eyelids or in the corners between the eye and the root of the nose, they make it difficult to blink and often restrict vision.