Since your son has been diagnosed with congenital glaucoma
and has had an eye exam done to prove it I recommend you visit your paediatric ophthalmologist for an evaluation of the other eye and a follow up of the left. Tearing, photophobia
and squeezing the eye shut has many causes in kids but .congenital or infantile glaucoma is always suspected. He may need a repeat evaluation under general anaesthesia
to reconfirm the findings of the right eye.