Warning signs and symptoms
1- Sudden change or deterioration in vision. 
2- Red eye 
3- Pain in the eye 
4- Sting in the eye 
5- Discomfort due to feeling a foreign body in the eye 
6- Photophobia 
What to do if I have any of the above mentioned signs? 
You have to go to the emergency or the nearest hospital/ health care center in the area where you live