Ahromaziya (
achromatopsia) - a disease characterized by severe impairment of color perception, in which the patient sees the world in black and white.
The disease is related to hereditary diseases, which is characterized by an autosomal recessive pattern of inheritance.
Sometimes, however, the disease has acquired the character and develops due to damage to the optic nerve or the central portion of the retina. Very rarely, this pathology may occur against the background of glaucoma.
Most often the disease is detected in childhood.
Causes of atopic dermatitis century
Atopic dermatitis century in most cases is the same reason - use of improper chemicals. Most often, this decorative cosmetics, skin care products or drugs in the form of ointments. That is why many lotions and creams should not be applied on the delicate and sensitive skin around the eyes. After contact with such substances are distorted immune response and inflammatory response begins.
Other causes include systemic allergic reactions such as conjunctivitis, wherein the inflammation can be located on the eyelids and under the eyes, and insect bites. However, it should be noted that allergic dermatitis age is extremely rare.
Chemical damage to the eyes are one of the really urgent ophthalmic situations. At that time, almost any chemical can cause irritation of the eyes, the most severe damage usually occurs by ingestion of strong acids or alkalis. Damage alkalis are more common and can be more dangerous, especially in the bilateral process that often ends in visual impairment and disability.
There are 5 degrees of severity of burns. The severity of damage is caused by chemical type, volume, concentration, duration of exposure, temperature and the degree of penetration of the chemical. They play a role as the age of the victim (much heavier burns can occur in children), previous condition of the eye and started treatment.
The mechanism of damage to acids and alkalis is slightly different.
