Inclusion Criteria:  had a normal state of consciousness, had no communication disorders, did not work in the night shift, had a general fatigue level score of ≥1 according to the Brief Fatigue Inventory  Exclusion Criteria:  had natural/artificial lenses, used medication that causes photosensitivity (tetracycline, doxycycline, nalidixic acid, voriconazole, amiodarone, hydrochlorothiazide, naproxen, piroxicam, chlorpromazine) had a change in their treatment plan in the last 6 weeks were not included in the study