The use of COCs does not generally cause xerophthalmia (dry eye).
Symptoms due to alteration of the tear film may appear in women like you who wear contact lenses, especially in those who spend a lot of time at the computer.
The important thing is to never use eye drops, but to keep hydrated by drinking plenty of water and taking breaks after an hour of activity at a PC. Products referred to as ‘artificial tears’ or specific sprays are available commercially. It’s better not to apply them on your own initiative, but to first contact a specialist for a consultation.