Should dad (hydrocephalus) continue donepezil even if it causes blurred vision or will dmg b permant?My dad had hydrocephalus and as a result has memory problems. His optic nerve has also been damaged as per the ophthalmologist due to the hydrocephalus or the many brain surgeries he had. However, I also think the donepezil (DONECIL) he is currently taking might be affecting his vision and maybe his optic nerve is not damaged (just trying to be positive).