The phrase "a sight for sore eyes" is an idiomatic expression that means something is extremely beautiful, impressive or pleasing to look at. Full definition
Your crunchy, shimmering, golden turnovers made my morning What a pretty sight for my sore eyes (allthatcooking.com)
The only sight for sore eyes would be the relatively low - resolution FWVGA display (instead of a qHD or HD panel) and 512 MB of RAM (1 GB would have been perfect). (vrzone.com)
This has been a sight for sore eyes after the past week of carnage. (newsbtc.com)