During pregnancy, the embryo has to see the light


Vitreous Eye embryo penetrated vessels feeding the maturing retina. In the development of the embryo, these vessels disappear, otherwise they would greatly hinder vision. However, if during pregnancy the embryo eyes have not seen the light, the blood vessels have disappeared from the vitreous body and the baby will be born with defects of vision. This is the conclusion reached by researchers at Children’s Hospital Medical center in Cincinnati and the University of California.

It used to be that the normal eye development is not possible without the light, but after birth. However, a recent study found that the fetus is in need of light and during fetal development. Scientists note that light acts directly through the body. Although it is impervious to sunlight, but still part of the world, and a very small way, and penetrates to the eye of the embryo. And such a small part of it is enough for the normal formation of the child’s eyes.

In experiments on mice, scientists have found that when exposed to light in the eyes of the embryo activated protein melanopsin available in humans. It is believed that the regulation of the circadian rhythm is being conducted with the protein. However, to state with absolute certainty that the same effect in the absence of light in the embryonic period is observed in humans, it is impossible to say.

It should be noted that cases of children born with abnormalities of the retina associated with abnormally overgrown vessels of the eye, occur frequently. It may well be that such defects are not always due to genetic causes, and to prevent them simply need to provide the embryo enough light. However, so far the results are rather fundamental than practical significance.

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