Soon it will be time to pack up the sunscreen, umbrella, and towel and head to the beach. In fact, a good way to get through the cool and wet days of spring is to sit back, close one’s eyes, and visualize sitting in a beach chair surrounded by sand on a hot, summer day and cooled by a gentle, ocean breeze and refreshing beverage. Some people are able to conjure up such vivid images that, upon opening their eyes, the images are still visible!
One friend tells me her images are not so strong, but it is the positive feelings associated with those images that register strongly. It turns out that not everyone can escape reality for a few minutes by visualizing a getaway to some beautiful setting. In the category of learning something new every day, I learned that there are people who have a condition termed, “aphantasia.”
When these individuals close their eyes and try to visualize a beautiful beach or the face of a dear parent or beloved child (or anything for that matter), they see nothing. I don’t remember learning about this condition, which was named by Adam Zeman, BMBCh, MA, DM, FRCP, a professor at the University of Exeter Medical School. He described a male patient aged 60-plus years who had lost the ability to visualize images following cardiac surgery.
Apparently, one in 50 people has aphantasia. The explanation is unknown, but the condition is presumed to have something to do with some sort of dysfunction in the parietal and frontal lobes. It can be congenital or (as in the case of the post-heart surgery patient) acquired. Functional MRIs of the brains of college students show seemingly widespread differences between the brain activation of those who score high compared with low in terms of the vividness of their brain imagery.
Peter J. McDonnell, MD
E: [email protected]; P: 443/287-1511
Dr. McDonnell is the director of the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, and chief medical editor of Ophthalmology Times.