Originally Posted by CheyAut
...Blues are also caused by frame and splash. And there is no way to know if the foals will get one, two, or no blue eyes. Luck of the draw if you will...
To my knowledge, there has been very little research to date about blue eyes in horses, so luck of the draw is probably the best answer.
Our bay tobiano mare has two blue eyes, but neither recent generations nor her offspring have had any blue eyed horses.