Eye color is determined by the presence in the iris pigment melanin produced melantotsitami cells.From the concentration of colored pigment is dependent coloring of the iris.
In most cases, it is the same for both eyes and is represented by the basic colors (blue, yellow, brown) and their variations.But sometimes due to some internal or external factors, there is a failure, and the eyes are different colors.
Heterochromia is not unique to humans.It also occurs in the animal environment, such as cats and dogs.
In most cases, heterochromia is under a genetic soil and is inherited.In this embodiment, due to mutations in the chromosomes of the baby is born already with eyes of different colors.
This anomaly does not affect the sharpness of his vision and not cause any problems, other than aesthetic.In today's world people have different color eyes, can benefit from corrective tint contact lenses if desired.
Sometimes genetic abnormalities lead to more serious violations, for which different eye colors are just one of the pathological symptoms.
For such diseases include:
There are several ways to treat inflammation of the maxillary sinuses.Most patients are usually afraid of the puncture in the sinus, or puncture...
normal human heart rate at rest - 60-80 (100) beats per minute.But depending on the time of day, physical activity, emotional state and physical...
chest cobbler or congenital funnel chest deformity (pectus excavatum), was first described as far back as the sixteenth century, and the first o...