I had been intrigued in the course of my visit to the optician, noticed at reference 1, by there being two or three regular microscopes in among all the fancy equipment. Used, according to the optician for looking at lenses, rather than at preparation of eye.
Then today, having been summoned to pay a visit to the eye people at St. Helier hospital, I got to examine a bit of the fancy equipment at greater length, very similar if not identical to the one in the optician. And it turned out to be another sort of microscope, probably something called the 700GL slit lamp microscope from Takagi. Not available from Amazon, but eBay offer microscopes from India, which look much the same, costing between £1,000 and £2,000. Rather less than I had been expecting.
The doctor also made use of something which seemed rather like the oil immersion objective which came with my father's microscope. With the difference that instead of being screwed into the objective tube and then would down into oily contact with the slide's glass slip cover, after anointing it with oil, he sort of stuck the thing onto the eye in some way.
Lots of bright lights, but no present cause for alarm.
PS 1: it seems that it is not worth wiring the thing into a computer so that snaps of the backs of eyes can be saved for the record, for posterity.
PS 2: 16:30: after having been warned about it for several days, we have finished the first tropical cloudburst and are now well into the second. Maybe fifteen minutes altogether so far.
Reference 1: http://psmv4.blogspot.com/2021/07/trolley-424.html.
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