Boychuk only suffered damage to his eyelid, not his eye, Lamoriello added. There is no timetable for his return, but Boychuk is expected to make a full recovery.
The incident occurred in the third period of the Islanders' game against the Canadiens. Montreal forward Artturi Lehkonen fell to the ice in front of New York's goal and clipped Boychuk on the way down.
Boychuk, 36, is in his sixth season with the Islanders. The veteran blue-liner has posted two goals and nine assists in 64 contests in 2019-20 while averaging over 17 minutes per night.