It helps to improve neurological function so that areas of the brain are more strongly connected. It uses physical movements and provides immediate improvement in the performance of the brain.
It comes in handy for speed reading because it requires your eyes to cover more distance on the page. Making your eye muscles stronger and more flexible improves your clarity of vision and retards the natural eyesight deterioration that occurs with aging.
You keep your eyes open and focus on a flame of the candle. A candle gazing meditation helps bring energy to the third eye, increases concentration, and improves memory.