Question

now a days children are affected by poor sight. collect information for this situation.and write what steps to be taken for preventing eye problems

Answer 1

too much screen time (from computers, e-readers, video games and smartphones) for children's eyes is overexposure to harmful blue light. All digital devices with viewing screens emit significant amounts of blue light (also called "high-energy visible light" or "HEV light") which might increase a child's risk of macular degeneration later in life.

Though the sun emits significantly more HEV light than computers and other digital devices, the added exposure to blue light kids receive from these devices and how close these electronic screens are to a child's eyes for hours each day have many eye care providers worried about potential eye damage over time.

To reduce your youngster's risk of childhood computer vision syndrome and computer ergonomics problems, make sure he or she is seated comfortably and has a "neutral" posture when working at the computer. Characteristics of this posture include:

Head is balanced on neck, not tilted back or forward. Computer screen should be positioned approximately 15 degrees below eye level.Back is straight and shoulders back but relaxed. Avoid slumping forward over the keyboard.Upper arms are close to the body and relaxed, not angled away from his sides or tilted forward.Forearms are flat on the desk, with the elbows forming at least a 90-degree angle.Hands are nearly level with forearm, with little wrist bend.Feet are flat on the floor or a footrest, with knees forming at least a 90-degree angle. (The angle behind the knee should be open; don't tuck legs under the chair.)

Many experts also recommend getting away from the computer every 20 to 30 minutes to stand and stretch. This helps relieve muscle tension that can contribute to computer vision problems and computer ergonomics problems.