Friday, November 24, 2017

Things have improved

First:  Hey, Jason, it is not a case of a "few drunken rants" by Gibson.   According to Joe Eszterhas,  Mel's views in private were (are?) just shockingly nuts and he was (is?) a completely gullible antisemite.  Read this article, if you never have.   I don't know how he has kept any other than the most superficial of friends.  Update:  this article asks a good question - How on earth did Mel Gibson get forgiven by Hollywood.?

Back to the point of the post:   I suspect it was my relatively late use of sunglasses as an adult that might have doomed me to this (I used to read books sitting in the sun in the Botanic Gardens without sunglasses all through university) but my increasingly smeary vision in my right eye means I'll be having a cataract operation in January.

Which has led me to wonder about the history of cataract surgery.  It's more lurid than I knew:
Cataract surgery is one of the oldest surgical procedures known, first documented in the fifth century BC.[12] In ancient times, cataracts were treated with a technique called couching, which could only be performed when the lens had become completely opaque, rigid, and heavy to the point that the supporting zonules had become fragile. The eye would then be struck with a blunt object with sufficient force to cause the zonules to break so that the lens would dislocate into the vitreous cavity, restoring limited but completely unfocused vision. Centuries later, the technique was modified so that a sharp fine instrument was inserted into the eye to break the zonules to cause the dislocation.
Fast forward 2,000 years or so, and things improved, a little:
The first reported surgical removal of a cataract from the eye occurred in Paris in 1748.[13] The advent of topical anesthesia made this procedure more practical. The early techniques involved removing the entire opaque lens in one piece using an incision that went halfway around the circumference of the cornea. It was critical that the lens remained intact as it was being removed, so surgery was restricted to so-called ripe lenses: cataracts so hardened that they would not break into pieces as they were being removed. This limited the surgery to only the most advanced cataracts. Since fine sutures did not exist at that time, patients were kept immobilized with sandbags around their head while the wound healed. Consequently, the early literature reporting cataract surgery routinely documented the mortality rate (secondary to pulmonary emboli).
Fortunately, now they need the tiniest of holes:
The evolution of smaller surgical incisions was matched by the development of new lens implants created out of different materials (such as acrylic and silicone) that could be folded to allow the lens to be inserted through a tiny wound. At the present time, commercially available lenses can be inserted through wounds a little over 2 mm.
 This is a pretty good period of history to be living in...

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