Las cataratas son la principal causa de ceguera a escala mundial.
Cuatro de cada diez personas mayores de 60 años tienen catarata. Son curables con un procedimiento sencillo y seguro.¿Que es la catarata?
La catarata es la pérdida de trasparencia del cristalino. El cristalino es una lente transparente que tenemos detrás de la pupila y que nos sirve para enfocar nítidamente los objetos. Por una serie de circunstancias, enfermedades o, más frecuentemente debido al paso de los años, el cristalino puede ir perdiendo su natural transparencia y convertirse en una lente opaca. Por tanto una catarata será más o menos avanzada dependiendo de si la disminución de transparencia es mayor o menor. Cuanto mayor es la pérdida de transparencia del cristalino (o más avanzada es la catarata) mayor será la disminución de visión.
Las cataratas son la principal causa de ceguera a escala mundial.
Cuatro de cada diez personas mayores de 60 años tienen catarata. Son curables con un procedimiento sencillo y seguro.
Existen diferentes tipos de cataratas, pero entre todas las más comunes son las denominadas cataratas seniles. Se producen en personas mayores de 50 años. El cristalino se torna opaco debido al daño que sufren sus fibras con el tiempo. Esto es debido a que las fibras del cristalino no son reemplazadas durante la vida de una persona, sino que se agregan nuevas fibras a la capa más externa del cristalino. De esta manera las fibras del centro del cristalino tienen mas edad que la de la persona misma, ya que están en esa posición desde antes del nacimiento.
Se ha relacionado también la formación de cataratas con mayor exposición a radiación ultravioleta (del tipo de la luz solar).
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