Conjunctivitis is a disease of the eyeball where its inflation occurs due to an infection or allergy
The ophthalmologist is a doctor who specializes in eye and vision care.
A doctor or family doctor is responsible for diagnosing and prescribing medical treatments to patients. The family doctor refers to patients where a specialist when a specific treatment is required.
An allergist is a doctor who specializes in the prevention, diagnosis and treatment of allergies.
Remember that for the proper selection of health professional that treats conjunctivitis you must consider the nature, severity and symptoms you are presenting.