Headache from display/eye strain

IT job WFH And then my own personal business. Almost 11 hrs a day on display. With 2-3hrs on break. From 11am-12pm

I always wake up fresh. But the eye strain starts appearing from 3 pm, By 6 it triggers headache.

Taking a small break doesn't work unless for 1hr+ But headache comes as soon as I sit back again

Taking baths indeed helps most days But once a week on average I end up taking paracetamol for an unbearable headache.

It is usually the back of the eyes and top of the head, sometimes the teeth muscles feels like numbing as well.

Weed works best but kills productivity Also I don't feel good morally being Ganjeri

I use quality anti glare glass , without the glass I can't even stare for 20 mins.

What can I do here?

Is paracetamol once a week safe on average? Or should I hit bong ? Is there anything else I can do to reduce it?

I visited eye doc thrice, never helped. Specially the 20-20-20 And yes, I BLINK normal