Conjunctivitis is often caused by viral and bacterial infections, while eye strain is often caused by prolonged use of electronic devices and improper eye posture.
In addition to eye fatigue, patients with conjunctivitis may also experience systemic symptoms such as conjunctival congestion, increased discharge, photophobia and even fever. Patients with eye strain can usually relieve themselves with rest, while patients with conjunctivitis often need medication to relieve themselves.