Hi there ~
I understand your concerns. It is not uncommon to have frequent itching in your eyes, although with or without redness
(called injection of eyes) and having a sensation of a foreign body in your eyes when you are doing cocaine frequently orally. I believe that it can also happen during withdrawals when you tend to use so as to avoid these symptoms. If this is the case you need rehabilitation
from the medication as you are probably both psychologically and physiologically dependent on the medication. I also believe that using the cocaine may also have very different effects on different people. Please avoid using the medication and if you feel you are having withdrawals please consult a substance use specialist psychiatrist
or a local doctor to help with the right treatment.
I hope this helps. Take care and have a lovely day!