Long-term half red eye circles may be caused by chronic conjunctivitis, chronic conjunctivitis is usually caused by adverse stimuli, and also has a certain relationship with chronic infections. Patients must pay attention to maintain eye hygiene, do not stimulate the eyes, do not overstrain the eyes, point Pralofen eye drops, ofloxacin eye drops and other treatments. 1. Patients must pay attention to maintain eye hygiene, do not stimulate the eyes, especially pay attention to rest the eyes, can not overstrain the eyes, reduce the stimulation of the eyes, from the root to treat chronic conjunctivitis. 2. Medication is also an important part of the treatment of chronic conjunctivitis, you can reduce chronic inflammation by ordering Pranoprofen eye drops, ofloxacin eye drops and so on. The specific cause of the long-term half-red eye circle needs to be further clarified in a specialized hospital, and based on the cause of the disease to be symptomatic treatment.