[hevi_jos]

People are different. Each mind is different. Only over 30% of the population is highly visual.

When people talk about "images" in the memorization world, they are not just talking about visual memories. But also touch(we have millions of touch sensors distributed along the skin) "images". Speech images. Spacial 3d "images", "smell images","kinestesic or muscle memory and so on.

A persona that is born blind can't make visual images, a baby with malfunctioning ears will not develop sound images. In fact, you could restore vision or cochlea "sensors" later in life and they will not be able to hear or see because the brain as a baby did not have it and neural connections were not made. This is the reason they test for hearing on babies and operate them as soon as possible.

But that a blind or deaf person could not see or listen, it does not mean that he could not make an "image" of the world, in fact some areas of their brains will be actually stronger than on people that can see or hear.

You have to know thyself, what are your strong areas, and favor those sensory images. I am deeply kinesthetic for example, so I always favor space relationships and movement, actions and so on.