If our normal vision is good, we are able to differentiate between one object and another clearly, and make out the features of all the people we know.
When somebody has cataracts the world starts looking blurry, and sometimes objects and people may merge into one another.
Patients with Alzheimer’s begin to see the world in a hazy or faded way. Objects and people appear dull and may become distorted.
When a person is affected with both (Cataracts + Alzheimer’s) it becomes twice as hard for them to make out people, objects or faces. They now see everything in a blurry and faded way and many things become unrecognisable.