What are the requirements for an Adult Dependent Relative visa? 

You can apply for an Adult Dependant Visa if you need long-term care to do every day personal and household tasks because of illness, disability, or your age; and the care you need is not available or affordable in the country you live in; and the settled relative you’ll be joining in the UK will be able to support, accommodate and care for you without claiming public funds for at least 5 years.