The Complete Guide to Interpreting Your Dreams

by Stearn Robinson - Tom Corbett
If, in your dream, you merely observed the cinders, you can expect a temporary setback in your present plans; but if your dream involved shoveling them, or handling them in any way, the forecast is for improved times ahead.

To have a cinder in your eye, indicates that you will be surprised by a request for help.

Give it if you can.

The Complete Dream Book

by Gillian Holloway
In your eye, a cinder is a portent of happening» that will be disagreeable but, if met with fortitude, will not last long.