The loss of vision usually only occurs after many years. What the victim does experience in the early phase of the disease is an itchy inflammation of the eye with redness and tearing. At a later stage the eyelashes turn in and rub on the cornea at the front of the eye, scarring it and ultimately leading to the loss of vision and blindness. It's very important to always thoroughly wash your hands and face and to avoid touching or rubbing the eyes with unwashed hands. Don't share towels and take care with articles which have been in contact with contaminated eyes.
Antibiotics bring healing.
Most of the time it develops a couple of days after arriving at your destination. Eventually vomiting and fever. Eat well-cooked or baked food, no raw vegetables and stick to fruits you can peel yourself. Cans and bottles may have been submerged in contaminated water. Avoid non-pasteurised dairy products.