In the case of clairvoyance the medium or channeler receives images as the means of communication. These may be images in the mind's eye of the medium or less frequently the medium may actually see a spirit person or object as if they are actually viewing them with their physical eye. In the latter case it is possible that the spirit is connecting with the visual mechanism within the medium's brain rather than the source of the image being in the actual external environment. The final images that we see of people and objects in the everyday world, after all, are a construction of the brain. But the spirit person will appear to the medium as if they are in the external environment. However, this explanation is speculative. No one is likely to be able to come to a definitive answer to this in the near future. For whatever reasons, spirit communications about the precise details of the mechanisms of mediumship can at times be vague or conflicting.
Through clairvoyance the spiritual medium or channeler may see a spirit person, object, scene or symbol. If they see a person conveying the information it is a little more straight forward though they may still experience the usual difficulties of describing a person who isn't present to someone else. The process can be complicated by the fact that the spirit seeking contact may not be that familiar to the person who they are wishing to communicate with. For instance a young person coming for a sitting may only be vaguely aware of the details of the family relative who is now trying to contact then from the Spirit World, and may not have any clear memory of how they appeared when living on the physical plane. You may wonder why the spirit bothers to try in such a situation. In my experience if an oportunity is on offer and it is important enough for the spirit person to attempt communication, they will try. It may be that it is not specifically the young person with whom they want to communicate. They hope perhaps that the person will relay their experience to other family members.
A further complication which can occur which was fequently experienced by the famous psychic artist Coral Polge is that relatives or friends in spirit may frequently present a more youthful image of themselves than they appeared during their latter years on the earth. Sometimes this may be because they wish to assure their relative or friend on the earth plane that they are well and happy. Coral Polge also wondered if at times there could be a little bit of vanity involved. Whatever the reason she found at times that this could cause some difficulty in the relative or friend recognising the person.
In the case of other images the medium will of necessity be more actively involved in their interpretation. Preferably they can relay the image to the person who they think is the recipient of the communication and the person may be able to interpret the image for themselves. However, it is likely that the medium or channeler will become more involved at some point and this interpretation of the meaning of images can give rise to many difficulties. It is particularly so in the case of symbols. Some have a fairly commonly held meaning, but many can be interpreted in different ways influenced by the experiences and memories of each individual person. Our own spirit group tell us that spirits experiment with using symbols with mediums to see how they interpret them in order that they can then refine the process of communication. However, at times they may give a symbol aimed more at the recipient's manner of interpretation than the medium's. As with all forms of mediumship it is a transaction or interaction between at least three parties. The process od communication at times may have more the feel of a game of charades rather than a clear dialogue.
Images can also be used to facilitate the process. For example some mediums or channelers may see a light or words or some other sign above or to the side of the intended recipient to facilitate identification of the peson whom the message is intended for.