Myopia is eyesight abnormality when a person can see clearly only nearby objects while distant objects appear blurred. Unfortunately, shortsightedness is widespread, both children and adults might have this abnormality.
Myopia, Hypermetropia and Astigmatism are abnormalities of refraction (light refraction in optic system). This means that light refraction of myopic, far-sighted or astigmatic eye is different from the healthy eye light refraction.
Refraction abnormality – astigmatism. Normal cornea has spherical form, that is its refractive force is the same both on vertical and on horizontal levels. In Astigmatism, the cornea refractive force on these levels is different. For example, in the vertical position the cornea refracts stronger than in the horizontal position.
Значительное распространение глаукомы, трудности ранней диагностики и серьезный прогноз служат причинами постоянного повышенного внимания к этому заболеванию со стороны ученых и практических врачей. Это глазное заболевание является второй по частоте причиной неизлечимой слепоты.