My 2 year old daughter has suffered from severe viral conjunctivitis now she is unable to open her eyes due to light sensivity , how can i help her?

See Eye MD: Light sensitivity is common with many eye disorders, including conjunctivitis. I would be concerned that she has a keratitis or iritis if the light sensitivity is severe. Take her to a pediatric ophthalmologist.

Artificial tears: Cool compresses and artificial tears can be soothing.

See doctor!: See an ophthalmologist, your situation is very concerning. You need to make certain it is only a viral conjunctivitis and it has resolved. Other possibilities could be herpetic, uveitis, corneal ulcer. Preservative free tears will not hurt.