Wearing the wrong type of glasses will do harm to your eyes. Incorrect glasses may not be good for the children under 10. You may see better with glasses that are specially made for you. Watching too much television may be bad for your eyes. This is not true for everyone. People with easily affected eyes may find they get red and achy   from watching TV for long. Carrots will help you see in the dark. Carrots are rich in beta-carotene (b). The body can change beta-carotene into vitamin A, and too little beta-carotene can cause night blindness. However, a lot of research shows that night blindness is more likely to be connected with some other vision problems. Night blindness can be caused by   _  .
wearing incorrect glasses watching TV for long too little beta-carotene too much vitamin A