I've written about this issue before in my Blog. Having a condition that is not necessarily visible at first, can make it challenging for both the person with the diagnosis and those that seek to support them. Especially in the early days, it can be difficult for people to realise that a person with Parkinson's has any issues. If they present as independently mobile, drive a car, can get up steps and all in all seems to be able to function alone in the community. However, they may have hidden issues that aren't immediately obvious. Not being obvious, doesn't make them any less important.