Are you kids not doing well in school?
It is really staggering to note that almost 20% of students who do not perform well in school do so because of vision problems. They may not be able to tell you the same, but it is your responsibility as a parent to have their eyes checked, particularly if you find that their grades are dropping or they are not as good at reading compared with other kids in class.
Many schools have an initial screening to check if their wards have any sort of Vision Problems. However, these kinds of problems might occur any time and without any warning signals. So, if you feel that there is any sudden change, it is always better to take medical advice.
There are many websites too, to educate parents and students alike on the different kinds of vision problems and the corrective action to be taken for the same. So, if your kid is having any difficulty, going through these sites could mean a lot to his/her welfare.