Watch this video! Museums make verbal description audio tours for the vision impaired. Its an important skill in writing about art to be able to describe the visual aspects of the work very clearly. This video serves as an example of how to describe what you SEE.
Verbal Descriptions Audio Tour: J.E.H. MacDonald’s The Tangled Garden
https://www.youtube.com/watch?v=cmUlqbV7Fqs
The Metropolitan Museum of Art, New York, New York
http://www.metmuseum.org/art/collection
The Art Institute of Chicago, Chicago, Illinois
http://www.artic.edu/aic/collections/
The National Gallery of Art, Washington, D.C.
http://www.nga.gov/content/ngaweb/Collection.html