Conjunctivitis, or “pink eye” can be caused by different pathogens - namely bacteria and viruses. Although symptoms tend to be similar, there are some subtle differences between the two types of conjunctivitis. Bacterial conjunctivitis tends to present with a beefy red color, while viral conjunctivitis often presents with a pink coloration. The two also present with different types of discharge: bacteria tend to cause thick, yellow-green mucous - this is the type of conjunctivitis that tends to cause eyes to be stuck shut in the morning. Viruses tend to cause a much more watery discharge and rarely results in eyelids being stuck shut. Both viral and bacterial conjunctivitis tend to cause swollen eyelids, pain or irritation, and may cause slightly decreased vision. Each version of conjunctivitis is highly contagious, being spread by contact. Some variants of viral conjunctivitis can invade the cornea, making these infections much more vision threatening than typical conjunctivitis. Treatment does differ between the two types of conjunctivitis. Although bacterial conjunctivitis may resolve on its own within a week, it is typically treated with an antibiotic ointment and/or eyedrop to decrease its duration and reduce symptoms. Viral conjunctivitis does not respond to antibiotics and thus is often allowed to run its course- typically resolving within 2-3 weeks. Symptoms may be relieved through the use of cold compresses and artificial tears. Our optometrists are trained to differentiate between both viral and bacterial conjunctivitis as well as allergic conjunctivitis and dry eyes. If you think you may have an infection, don’t hesitate to schedule an appointment.