ВНИМАНИЕ! На форуме началось голосование в конкурсе - астрофотография месяца МАРТ!
0 Пользователей и 1 Гость просматривают эту тему.
Поищите
The relative contribution of genes (nature) versus environment (nurture) has been the subject of intense debate, and is probably complex.54-56 For example, the high prevalence of myopia in Singapore and east Asia, compared with similarly aged white and black populations in other countries, may be related to ethnic variations in either genetic or environmental exposures.58However, several lines of evidence point to a strong genetic role. Variation in genetic exposure has been suggested as explaining differences in education adjusted myopia prevalence between young adult Chinese, Indians, and Malays in Singapore.614At the molecular level, genetic loci for certain pathological variants of myopia have been localised.6263 Preliminary studies in Singapore are currently conducted to identify candidate genes for myopia.64
Nevertheless, the pathogenic pathways for myopia outcome are not clear. Some experimental studies suggest that myopia develops from failure of either the input or output components of the “active” visual feedback mechanisms that regulate eye growth.55 For example, degrading the retinal images of animal models (input failure) has been shown to accelerate eye growth and myopia.65Several chemical modulators have also been suggested as having important molecular roles in the causation of myopia.6667
жизненный опыт по данной теме