How do I reduce the cylindrical power for my son who is just 6+ years ,his powers -3.5 in right eye and -3.0 in left eye. Do I need to give him any particular intake, I mean in food so that it may help us in someway or any other treatment to improve is eye sight or protect the power to increase. I am suffering from the same since my childhood, even I have cylindrical and sp power both, now I am suffering from PMD. My left eye cylindrical power is -17 and right eye -6. So , I am afraid that , if it is not affect to my Son. Need your suggestion in all respect.