Update;
I pulled them apart as a last ditch effort to see if there was anything obviously awry with them. When I got in there, I saw a metal plate that was holding the prism in place. One of the screws was a bit loose so I tightened it up. Hey presto, alignment is back! That's good. These bino's are sentimental for me so I don't have to send them to an early grave :-)
Quote:
Originally Posted by glend
Originally Posted by glend View Post
Just how old are you? Binoculars, and binoviewers, are great if you have two wonderfully matched young uncorrected eyes with no age relared macukar deteriouration. Most older folks will not see any benefit from binoculars as the human brain averages the image input, in other words your brain will dumb down your good eye, if you have one. Far better to stick with identifying your good eye and using that alone as your visual tool.
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I'm not that old - 43. I decided to measure my pupils the other night and was suprised on two accounts; one - that my eyes were different. For some reason I would have thought they would degenerate together. It was disconcerting to see that it has actually happened, but -two- I was pleased to see that my left was at 7.5mm, which I thought was pretty good for my age.
But then I went looking for data and according to
this study, that's not all that special. Sure the *mean dark adapted pupil diameter goes down after peaking in your twenties (6.15mm is the mean for my age group, which is about where my right eye is at). BUT, the range of measured pupil sizes in my age group went from a measly 4.5 all the way to a whopping 8.2mm! Even in the 60-69 age bracket, they had measurements between 3.5 and 7.5 mm (mean 5.6mm). So there's no rule that your eyes *have to degenerate it's just luck of the draw, like with hair loss (not so lucky there, I'm afraid! :-/ )
Best
Markus