myopia
human error.........
The most common refractive error is myopia, also known as nearsightedness. This condition causes distant objects to appear blurry, while close-up objects can be seen more clearly. It is usually caused by the eyeball being too long or the cornea being too curved.
The most common causes are human error and faulty equipment.
The most common fault in any system is human error. This can range from simple mistakes to more complex issues stemming from miscommunication, inexperience, or lack of attention to detail. It is important to implement processes and checks to minimize the impact of human error.
refractive errors
Blindness is the inability to see anything, while vision impairment happens when an eye condition affects the visual system and its vision functions. The most common causes of blindness and vision impairment at a global level are cataracts and refractive error.
The most common purpose of ophthalmologic surgery is to restore or improve vision.
Planes crashing are actually not as common as one would think. Car accidents are much more likely to happen. The most common causes of planes crashing are due to human error by the pilot.
Human Error
chemical
The most common mineral found in the human body is calcium.
Pilot error.