There's lucky

[Harry Bloomfield, Esq.]

Last time I used the car, as I parked up in my garage back home, one of the lenses of my driving glasses fell out, just as I removed them. The clamp screw had udone itself, releasing the lens. In a bit of a rush, I just tapped myself down, hoping the screw would land on my seat, so I could find it later.

Getting the car out yesterday, I realised I forgotten to deal with the problem, so I searched the seat, the car floor and the garage floor without finding the missing screw. I grabbed the glasses and lens, to take indoors to see if I could find another to fit, only to find the missing screw still caught in the frame. All it needed was the lens put in place and the screw tightened into place.

[alan_m]

In my experience, if the screw comes out once it will do it again unless you put a bit of superglue or nail varnish on it to stop the screw turning.

[jon]

There is a god.

[Harry Bloomfield, Esq.]

on 22/05/2021, alan_m supposed :

Yep, did that - I used superglue.

[Andy Bennet]

If true then the screw wouldn't have come out in the first place.

[The Natural Philosopher]

yep. I am not in favour of a religion which bashes your head against the wall so its lovely when it stops

[jon]

...perhaps the joke is countless human misery.

[Joey]

All of those screws have been captive screws with all of my frames and I have had lots over the 65+ years I have been wearing glasses.

[Joey]

You have to be careful with that, I f***ed a pair of sunnys with a fingerprint of superglue on one lens.

[Harry Bloomfield, Esq.]

Joey pretended :

This one might have been, but I have had a few before which were not.

[Tim Lamb]

In message [e-mail]>, Joey [e-mail] writes

Mine drop out regularly. I have a set of watchmakers screwdrivers and lots of disused glasses to cannibalise.

Specsavers were very sniffy when I asked if I could have/buy a few spare screws. They start off much longer for ease of handling and you break off the excess once tightened.

[Fredxx]

It's an intentional design feature, to get someone else to scratch your back.

[newshound]

Often not sufficiently captive though. They seem to be centre punched to secure them; presumably glasses shops have a neat jig for holding them securely, with either a press or a guided punch. I have often thought about asking them how they do it.

[Bob Eager]

Years ago I bought a littel kit that included a (useless) mini screwdriver, some nose pads, and assorted screws. Still have a lot of it.

[Max Demian]

I can. I can even touch fingers behind my back. But only one way; I'm somewhat asymmetrical.

[Joey]

Then you should get a clue and use a different supplier or use nail varnish etc when you get a new one.

Makes more sense to do the above.

Still better to ensure they don't come unscrewed.

[Harry Bloomfield, Esq.]

newshound has brought this to us :

The worst struggle, was getting the screw started. I tried starting it with the lens in place and I couldn't get the frame gap closed up enough. I then finally did it by just starting the screw, then squeezing the lens in, before screwing it in all the way.

My plan c, would have been to pull the frame together with the lens in place, by using 5amp fuse wire around the brackets, to enable the screw to start.

[Brian Gaff (Sofa]

And a bit of loctite applied first? Brian

[The Natural Philosopher]

Acetone - nail varnish remover - is the easiest to obtain solvent for superglue

I do not know whether it also dissolves polycarbonate lens coatings...it does not attack polycarbonate itself

[The Natural Philosopher]

None of my glasses have ever had captive screws. Fortunately I have a decent stock of obsolete glasses for spares