Keratitis is an inflammation of the cornea that occur on the layer of the cornea (epithelium, bowman’s layer, stroma, descement’s membrane, or endothelium). Can be caused by infectious and non-infectious. At serious infections can cause ulcers.
In normal condition, corneas are strong layer to protect eyes, so bacteria or fungi cant penetrates on your corneas. But if an object scratches the surface of one of your corneas or penetrates a cornea, keratitis without an infection may result. In addition, an injury may allow bacteria or fungi to gain access to the cornea through the damaged surface, causing keratitis that involves an infection.
B. Contaminated contact lenses.
Using nonhigiene contact lenses can be caused Keratitis. Bacteria, fungi or parasite like acanthamoeba may inhabit the surface of a contact lens and contaminate the cornea when the lens is in your eye, resulting in infectious keratitis.
Viruses such as the herpes viruses (herpes simplex and herpes zoster) and the virus that causes chlamydia may cause keratitis.
Bacterias such as Streptococcus pneumoniae (Cornea’s pathogenic bacteria), opportunistic bacteria such as Streptococcus alfa-hemolyticus, Staphylococcus aureus, Staphylococcus epidermidis, and M fortuitum-chelonei can cause keratitis.
Kind of Fungi that commonly caused Keratitis such as opportunistic fungi like Candida, fusarium, aspergillus, penicillium, dan chepalosporium.
F. Contaminated water.
Chemicals in water such as those used in swimming pools may irritate the cornea and cause irritation and a physical breakdown of the delicate surface tissue of the cornea (corneal epithelium), resulting in a chemical keratitis. This is usually transient and may last only minutes to hours. Bacteria, fungi and parasites in water, particularly in oceans, rivers, or lakes, can enter your eyes when you’re swimming or bathing and result in keratitis.
F. NON INFECTION KERATITIS (Alergic)
Conjunctivitis-Fliken is a slow hypersensitivity type response to S. aureus or Mycobacterium tuberculosis.
1. Eyes Redness
2. Photophobia (Sensitivity to light)
3. Eye pain
4. Difficulty opening your eyelid because of pain or irritation
5. Decreased vision
6. A feeling that something is in your eye
7. Ciliar Injection and Conjunctiva injection
8. Excess tears