Thanks for posting your query..Keratoconus
is a progressive condition where your vision slowly decreases with increasing and irregular refractive error
Depending on the stage and severity, there are various treatment options for keratoconus. ( C3R in the early stage to retard the progression of disease, scleral contact lenses, customised ablation and INTACS to correct the astigmatism
and as a final resort keratoplasty).
Your treating doctor can give you advise regarding which needs to be done depending on severity.
The symptoms could be because of eye strain
but vertigo cannot be ruled out..
Take care. I am available for any more queries..