easy on the eyes - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Also, easy to look at. Attractive, beautiful, as in That model is definitely easy on the eyes. [Colloquial; c. 1900]