Explanation:

Bacteria is responsible for the Trachoma.
It is a bacterial infection that affects the eyes.
Trachoma is the leading preventable cause of blindness worldwide. It's very contagious.
Trachoma almost always affects both eyes. Symptoms begin with mild itching and irritation of the eyes and eyelids. They may progress to blurred vision and eye pain.
Antibiotics treat early-stage trachoma. Surgery is required in later stages. Access to clean water and improved sanitation are key to prevention.