Our eyes are taking 10 pictures per second. So on a daily basis, the eyes are constantly taking 576,000 pictures if a person sleeps for 8 hours. Which camera in this world can continue to function for years and years without being electronically charged like the eyes? Indeed, the creations of Allah are something to think about.
In addition, an average eye blinks 12 times a minute. That's an amazing 11,520 blinks a day if a person sleeps for 8 hours. There are diseases which prevent a person from blinking by causing the eye lids not to open or close. The people suffering from such diseases trully understand the value of blinking. Let us thank Allah for allowing us to blink over 10,000 times a day without paying a dollar.