Well, yes, it is very beneficial for your eyes. As we know that fennel seeds can be very good for our body' health, and especially for our eyes, you can use them. For example, by using them, they do a good job to your Puffy eye, sore eyes or blood shot eyes. You can soak fennel seeds in 1 cup of water and filter it with a sieve. And then just Wash your eyes with this water for a long time. And it can relieve your symptom. Besides, you can hew fennel seeds every day without sugar, so that your blood will get purified in a few days. Also, complexion of skin will also be enhanced. Anyway, it is very beneficial for you. Just have a try.