- whose visual acuity is 20/200 or less in the better eye with correcting lenses, or whose widest visual field is no greater than 20 degrees;
- whose visual disability, with correction, prevents the reading of standard printed material;
- unable to read or unable to use standard printed material as a result of physical limitations. (NLS 2006)
So, what does the Chaffee Amendment do for those who are visually impaired? It allows for an "accessible copy" to be made without requiring permission from the author or creator of the work as long as that copy is only to be used by the visually impaired and expressly states that purpose.