An ESL class is different because it often includes students who speak a variety of languages. The teacher must use techniques that all of these students will understand. Pictures are one of the most used tools because most children know, for example, what a dog, flower, or a car looks like.
Keratitis, the eye condition in which the cornea becomes inflamed, has many potential causes. Various types of infections, dry eyes, injury, and a large variety of underlying medical diseases may all lead to keratitis.Some cases of keratitis result from unknown factors.eratitis facts. 1  Keratitis is the medical term for inflammation of the cornea. 2  Keratitis has many causes, including infection, dry eyes, physical and chemical injury, and underlying medical diseases. 3  The diagnosis of keratitis can be confirmed by the use of a slit lamp.
The exact cause of keratoconus is unknown. There are many theories based on research and its association with other conditions. However, no one theory explains it all and it may be caused by a combination of things.It is believed that genetics, the environment and the endocrine system all play a role in keratoconus. Eye Rubbing: Keratoconus corneas are more easily damaged by minor trauma such as eye rubbing. 2  Poorly fit contact lenses (that rub against the irregularity of the KC cornea) have been suggested as a possible cause of keratoconus; this has not been proven and remains questionable.