General term for a very pale yellow or straw-colored dammar from trees of the genus Hopea, considered one of the highest grades of dammar. It is no longer sold commercially. Yellow in color and often sold in round balls, thus the name "cat's eye." General term for a very pale yellow or straw-colored dammar from trees of the genus Hopea, considered one of the highest grades of dammar. It is no longer sold commercially. Yellow in color and often sold in round balls, thus the name "cat's eye."