👉 Arachnitis, also known as spider eye or spider vision, is an inflammation of the eyelid and conjunctiva (the clear membrane covering the back of the eye) caused by spider mites. The symptoms can include redness, itching, pain, swelling, and a burning sensation when looking at objects close up. Symptoms usually start within 24 hours after exposure to a spider. Treatment may involve using antihistamines or corticosteroids for relief.