The Scientific Legacy of Jožef Stefan

How many scientists have a law, a constant, a dimensionless variable and a problem named for them? And go on to be hailed as a great teacher of the subject? I know one. Jožef Stefan.
In 2009 I wrote a post on a paper that discussed about the scientific deeds of Jožef Stefan. The author of that paper, Prof. John Crepeau, after reading that post, invited me to write a chapter for an e-book on Stefan that he was editing. As he had already lined up several experts by then to write on specific contributions of Stefan, I was commissioned to write the last word -- chapter -- to summarize things in a chapter titled "The Scientific Legacy of Stefan".

Yesterday, that book Jožef Stefan: His Scientific Legacy on the 175th Anniversary of His Birth got published. Here is the preface. You can purchase separate chapters; write to me for a pre-print version of mine.

The Story of Vitreous Circulation

Several months back my father noticed black spots in his vision in the right eye. After a thorough check-up at a premier eye hospital in Chennai, he was diagnosed with a 'retinal tear'. Read more in wikipedia, under retinal detachment. Why does this happen? Remedy? What has this got to do with the title story of vitreous circulation?

The human eye is an imperfect sphere, about 24 mm (just about an inch) thick in the major axis, from the cornea on the front side to the retina on the back side. In between we have the lens supported on the front side by two tubular 'hooks' containing the aqueous humor fluid. As the name implies, this fluid is aqueous and can even circulate within the tubular 'hooks'. The retina, on which the lens focuses the images of what we see, is separated from the lens by a vitreous humor. This vitreous humour, by default, is not aqueous; it is jelly-like, what is known technically as a Non-Newtonian fluid. It maintains the shape of the eye, keeping the distance between the lens and the retina. As we age, the vitreous gel loses its aqueous nature and hardens. Unfortunately, as it hardens and contracts, confined between the retina and the lens, it 'pulls' on the walls. In effect, for some of us as we age, the retina is pulled in -- a retinal 'tear'.

The remedy is to stick the retina, figuratively, back in its place. For this, first we need to slice open the eye behind the lens and scoop off the jelly-like vitreous humour. Then, the retina is stuck back in its place by cauterizing it with targeted laser heating. Then the eye is stitched in place and closed. Within few weeks, bodily fluids ooze into the region between the retina and lens to replace the original hardened vitreous humour that was scooped off. Hopefully, when the eye patch is taken off, the vision should be minus those black spots and become normal. These things went on fine and let us say my father regained his normal vision.

But all of this is only background information for a short story that took off in between, which (obviously?) involves me and my research.