كل يوم معلومة طبية

المراجع
http://www.webmd.com/eye-health/cataracts/what-are-cataracts#1 http://www.webmd.com/eye-health/cataracts/ss/slideshow-cataracts http://www.allaboutvision.com/conditions/cataracts.htm https://www.healthline.com/health/cataract