The phrase "a sight for sore eyes" is typically used to describe a person, object, or view that is pleasing to see after a period of difficulty or unpleasantness. It implies that the thing being seen provides relief or comfort to someone who has been experiencing discomfort or hardship.

For example, if someone has been traveling for a long time and is tired and homesick, seeing a familiar face at the airport might be "a sight for sore eyes." Similarly, after a long day at work, coming home to a cozy and inviting living room might be "a sight for sore eyes."

The phrase can also be used sarcastically, in situations where the thing being seen is not actually pleasing but is being presented as such for comedic effect.