‘Blind data’ is custom data that you can store on any object or its components (vertex, edge, polygon, etc). The documentation says ‘Blind data is information stored with polygons which is not used by Maya in any way..’ I believe it is used when importing meshes from other apps that have properties that do not map to Maya, so that when you take them back to those apps, those properties remain. Any
![Abusing 'Blind Data' in Maya - Stumbling Toward 'Awesomeness'](https://cdn-ak-scissors.b.st-hatena.com/image/square/3e72679ca285c7addbc0639e8934f47a2afe483b/height=288;version=1;width=512/http%3A%2F%2Fwww.chrisevans3d.com%2Fpub_blog%2Fwp-content%2Fuploads%2F2013%2F01%2FblindDataHeader.jpg)