Keratitis is a condition that affects the eyes of cats, and it may become a chronic disease that will ultimately affect the pet's vision. The condition will manifest through excessive tearing and ocular discharges. Keratitis can be treated once detected.he condition can dry the cornea and for this reason, it is also known as 'dry eye.' The causes of keratitis are not precisely determined, but certain factors may be suspected: 1  The feline herpes virus. 2  A foreign object that reaches the cornea. 3  An eye injury.
Quick Answer. The incubation period for head lice is between 6 and 9 days, or roughly one week. After hatching, young lice (nymphs) become adults in about 7 days. These adult lice can live on a human head for up to 30 days. Continue Reading.
But, it's equally important to make sure that they're removed from your home, too. Following are tips that can be followed at home to help remove lice from your environment. Lice can survive up to 26 hours off the head. Lice eggs, or nits, do not hatch off the head except in extremely rare conditions. Treating head lice with heat. The first line of defense is to wash linens, pillowcases, hats and clothes in very hot water that is at least 150F/66C for no less than 10 minutes. This is usually accomplished by washing these items in hot water and drying with high heat.