It is important that people know their body. As much as headache, nausea and fatigue can be a sign of flu, it could mean something different in older individuals. There are several signs of change to look out for, and one is a change in vision. Poor vision tends to progress with age. However, when vision changes include sudden double vision or the inability to focus, prompt medical attention should be sought. Other changes to be vigilant about are sudden difficulty walking, dizziness, loss of balance or coordination, trouble seeing with one or both eyes, severe headache and drowsiness”, says Dr Edwin Mogere, a neurosurgeon at the Aga Khan University Hospital.