A nightlight is a small light fixture, often electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as in an emergency. Recently, a study has shown that sleeping with the light on or with a nightlight was associated with a greater incidence of nearsightedness in children. Another study has indicated that sleeping with the light on may protect the eyes of diabetics from retinopathy, a condition that can lead to blindness. When it comes to protect night lights, the first thing you need to do is close down your light when you go to bed. And then avoid being stay out for a long time at night because many lights which light up at night can produce many night lights. Eating some fresh fruits and drink some green tea which help with bright eyes.
Yes, I think so. At night, the environment is dark and dim. There are sensors in eyes to catch the changing of light. Once people get into dark environment, the pupils would dilate to let more light enter and focus on the retina. The light at night is usually strong, if in the people's vision, suddenly a strong light source came up, the dilated pupils can't adjust so quickly so that too much light would entered and damages the eyes. I think, to protect eyes, we should not stare at the light source, which gives too strong light for dilated pupils. There are two kinds of cells in eyes, rods and cones. Cones are more active in bright circumstances and they are extremely sensitive, especially to colors. While rods are more active in dark and they can help people to catch fast movement and the shape but not details and fine parts. Try not to catch the colors, contrasts or fine details in dark. If you wear glasses, a special coating is recommonded to reduce the glare.
The answer is absolutely yes, the night lights is really bad for your eyes which may hurt your eyes. As we know, the night lights is bright especially with the comparison of darkness, the strong light may hurt our eyes by stimulating the eyes. The lights may intense the eye muscles at the same time, it may stimulate your eyes nerves which may cause the tiredness of your eyes as well as shortsightedness. In addition, it can not only cause the eye problems but also is bad for the body health, such as dizziness or headache. Thus, just get away from the night lights as far as possible in consideration of your health.