Can color blindness be cured or improved by any means?

Not usually: Congenital colorblindness is static and cannot be improved and will not worsen. Patients with this defect learn to account for their difference in vision over time. Acquired color blindness due to retinal or optic nerve damage can occasionally be partially reversible if the causative factor is removed. Often this is not the case though.

No: This is a failure of the eye to develop a normal spectrum of color perception as an inherited disorder. You can also lose color perception by broad retinal disease and some brain disorders. No medicine or surgery can help. Aids such as red colored contact lenses simply shift the spectrum of color deficiency a lilttle so you can pass the standard tests. But then you are color blind another way.