Vitamin A plays a role keeping the cornea to keep it healthy. Normal eye is usually issued mucus, the viscous liquid fatty issued mucosal epithelial cells that help prevent fat condensed issued mucosal epithelial cells thus helping to prevent infection.<\/p>\n

When the body lacks vitamin A, epithelial cells will remove keratin, a protein that is insoluble in water and not mucus. When epithelial cells remove keratin, cells membrane will dry and harden, and the state is known as keratinization. The state would then take place when the cause of disease xerophthalmia.<\/p>\n

Xeroftalmia<\/strong> are circumstances when a person experiencing a shortage of vitamin A, first keratinized eye conjunctiva, and cornea are also affected. When untreated, the eye will be blind. Marks the beginning of a vision impairment as a result of vitamin A deficiency is the declining ability to see light dala vague. A child suffering from vitamin A deficiency is usually when running in the vague light often bumped into existing objects in front of him.<\/p>\n

This is because there are chemical changes that occur in the retina of the eye. Under normal circumstances the retina of the eye there is a substance called rhodopsin, which contains vitamin A needed in a series of visual stimuli acceptance at any time during the day If there is a deficiency of vitamin A, it means redopsin formation process will be disrupted. This is what is the causes of childhood rabunnya in a state of faint light or dusk light. Therefore, the disease is called night blindness or hemeralopi disease.<\/p>\n

In both the manufacturing level will be reduced so that the tears of the eyes or mucous membranes become dry and konyuntiva appear many times. On the left and right parts of the eye will look shiny white stains like fish scales. And these spots are called Bitot spots. The symptoms of dryness is called xeroftalmi konyuntiva.<\/p>\n

This disease can be cured without leaving scars or defects in the eye. When dlam extent this xeroftalmi children do not get treatment, then there is a greater danger, namely injury to the cornea. Sometimes it’s really great wound so that the whole cornea was destroyed. Such a situation is called keratomalasea. Patients will be blind at all.<\/p>\n

(B) Epithelial Tissue Damage.<\/strong>
\nVitamin A deficiency also causes a change – a change in the tissue lining (epithelium). This lining tissues would be hard because of the horn cells. Because of this, people who are not deficient in vitamin A is susceptible to respiratory disease or gastrointestinal tract.<\/p>\n

(C) Growth Disorders<\/strong>
\nLack of vitamin A can also disrupt the body’s growth. In addition, vitamin A deficiency may affect bone growth.<\/div>\n