Table 1. Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
Age 25–80 years	Aged <25 years or >80 years
Diagnosed with DES (DESG) Schirmer <10 mm/5 min were diagnosed + FBUT <10 s was considered +	Atopy and allergic disorders
Healthy subjects (CG)	Wearing contact lenses
Presence of DES symptoms	History of refractive surgery, ophthalmic laser treatment (<3 months)
Able to participate in the study	Systemic diseases and general treatments
Informed consent	Patients presenting with intermittent ocular surface signs and symptoms.
	Ocular disorders and eye drops other than artificial tears
	Not able to participate in the study

DESG: Dry Eye Syndrome Group; CG: Control Group