This useful little remedy is very easily seen in Coughs and Colds and Hayfever.
When there is a watery discharge from the eyes that burns think of Euphrasia. If there is a nasal discharge most often it will also be watery (compare and contrast with Allium cepa).
In all eye conditions you can think of Euphrasia. Think of red, burning eyes with watery burning tears and you have a picture of this remedy. Eyes that are irritated by light or by wind may need Euphrasia.
Cold
Eye inflammation
Hayfever
Measles