4 years old toddler close his eyes so many times

Hi there momies!

I have a control on a oftamologic dr with my toddler because he make some weird act with their eyes like he close their eyes so many times and when i ask him why you make this, he said my eyes hurts! Doctor said that his eyes are not damaged, There is no problem with eyesight.

But he don’t know why he make this act!! He make it more when he sees TV.

I am a little worried. Does anyone have been in the same situation with their kids ?! My boy is 4 years old, and I want to emphasize that he has long eyelashes .

It is possible that their long lashes irritate his eyes?

Thank you everyone that comment for an opinion.