жемчужная катаракта

It is necessary to take into account and such fact. That the refraction of an eye never happens a constant, does not allow to write out the exact recipe on glasses. It is no wonder, that some people and do not manage to pick up glasses to which their eyes would reconcile. Inconstancy of a refraction results, besides to that discrepancy which we can observe in the statistical data on prevalence of those or other kinds of infringement of sight. Подробнее...

As speech has gone about glasses it is possible to allocate two their kinds: sunglasses and glasses with optical lenses for correction of those or other infringements of sight. Подробнее...