There exists the big difference between the bacterial conjunctivities and viral conjunctivities from the definition. When the violation of pathogenic bacteria is more than the host defense function or host defense function damage, such as dry eyes, long-term use of corticosteroids and so on, it can cause the eye conjunctival inflammation and purulent seepage which should be suspected bacterial conjunctivitis. Usually the bacterial conjunctivities could be cured for about a week by using the eye drops with anti-inflammation role. And the viral conjunctivitis will have 5 ~ 12 days after the incubation period of symptoms, including conjunctival congestion, watery discharge, eye stimulation, waking up eyelid and sticking eyes symptoms. It usually starts at many patients with contact conjunctivitis. Suffering from respiratory infections bulbar conjunctiva and palpebral conjunctiva congestion, the palpebral conjunctiva appear conjunctival follicle. It could be treated for more than a week by killing the bacterium and infection in the eyes.
Well, it seems that you are quite interested in this particular field right? So, as a matter of fact, there are lots of ways to distinguish between both of them. Anyway, here I recommend analyzing the discharge of the eyes. Generally speaking, viral conjunctivitis generate some thin and water like discharge, but bacterial conjunctivitis could lead to a lot of thick discharge. But you still need to do some clinical analysis in the hospital to identify the type ok?