Prevention of diseases Children diseases    Strabismus   Amblyopia   Refractive anomalies   Learning problems   Retrolental       fibroplasia   Eye accidents   Recommendations Adult diseases	Retrolental fibroplasia Formation of a membrane behind the pupil develop in 20% of premature infants who receive oxygen therapy after birth and was, in older days, the major cause of blindness in children. Thanks to careful monitoring of the O2 supply in premature children, the frequency of the disease decreased in recent years. For children in this risk group sometimes vitamin E supplement will be administered.