Welcome to HCM.
Could you please let us know what are the components of Miscall F?! To be honest,I am not able to give the appropriate answer as I am wondering what it is :).
Unless it is allergic to your daughter I don't think it will cause any specific change (especially after 3 weeks). As an immediate response to any allergic drug, the body(eye) responds by showing reactions / redness
, hazy vision , itching ,swelling around that eye....
So I would say your daughters defective vision may not be due to (miscall F as u have mentioned).
Anyway, since she is complaining of difficulty in seeing in that eye, get an eye check up done to rule out refractive error
or any other retinal problems .
If possible,do send us the details of Miscall F.