Are you sitting too many hours working on your PC. Check if you need to wear glasses :)
It's a simple test look at the picture below
If you see the face of the great scientist Albert Einstein then everything is just fine.
It's a simple test look at the picture below
If you see the face of the great scientist Albert Einstein then everything is just fine.
But if you have bad vision then you will see Marilyn Monroe.
If you have a good vision you can still see Monroe by taking some steps back and looking the photo from a distance.