Some glasses that can live with a little temporary gunk on them.
Duck or masking tape.
At a recent Stroke Association meeting we discussed what we can do to offer people a window into the experience of stroke survivors. For example how could we simulate what it feels like to lose the use of an arm? Or what vision loss caused by stroke might be like?
Vision loss from stroke is most commonly ‘homonyous hemianopsia’; loss of the right-hand (or left depending where the stroke is) field of vision in both eyes. I know there are special glasses to simulate this. But can we do something simple as part of 101 Experiments? Yes.
Tear off two strips of tape, each enough to cover half of each lens of you glasses and stick them on the left hand side of each lens. I found this a bit confusing to get right (and also needed a second pair of specs to see what I was doing). Here’s what your ‘hemi specs’ ought to be like.
When ready pop the specs on and look around the world. Do some reading. I guess it will be a bit of a strain.
This is really quite a good simulation of right hemianopsia. Viewer: I have this condition.
I was wrong to be skeptical. It’s not perfect, nothing can be, but this simple experiment is likely to get as close as any more complicated simulation.
Notice that it feels the problem is mostly in your right eye, although the artificial impairment is to both. This is exactly the subjective experience of hemianopsia patients. Vision on one side has been lost in both eyes but the feeling is that the problem lies only in the eye on the side affected.
The next in the series, 4/101, will be ‘Frostie specs’ .