hello there, thank you for bringing in in this rare gem of an item for inspection and appraisal.
So just looking at the external areas there's a fair bit of
wear and tear which is not necessarily a bad thing
but it shows that this item may be a very special antique. Do you still use this item in the clinic?
That's understandable. Right so the case
is in good order, I'm not too fussed about the wear and tear, let's just check locks
they're working fine and let's just have a little look inside
this is a very special piece here this looks like an antique trial lens set.
The first thing I like to do before inspecting
anything is to have a little listen to the lenses
give me a little moment please
now one of the unique selling points for something like this for me are the lens
can you hear those beautiful clinks?
just bring them back this way
marvellous, I'm very happy with those so just let me inspect the internal case
a very good cushion there for lens protection, the accessories are here
okay so it looks as though you have
a mixture because some of the lenses are missing. A mixture of small aperture lenses
and full aperture lenses here
that's fine, I'll check the lenses a little bit later. First I want to
have a little look at some of the instrumentation
first up we have this beautiful antique trial frame
very thin sides with the wrap around design,
so it just flattens there, a slight increase in surface area, it's for comfort purposes
for the patient. You have your little PD scale here and the adjustment dial there
needs a little bit of a service
okay let's just try one of the lenses
excellent
So the lenses fit nicely into the trial frame there
a little height adjuster. That's the antique trial frame there
looks as though we have two cross cylinders
we have a 0.50 cross cylinder, beautiful knurled handle there
we have another cross cylinder here,
there's no markings to indicate the power but you can see there 0.50 across cyl
the minus meridian is depicted by the black and the plus is depicted by the red markings there.
0.50 cross cylinders. We have a little handheld Maddox Rod here
but unfortunately, are some cracks on the Maddox Rod there
so unfortunately it's not going to be in good working order, so that'll need replacing
right let's have a little look at some of the accessories
we have a Maddox Rod there
depending on whether you're checking horizontal or vertical phorias
we actually have two
Maddox rods there, marvelous, they're five
have a green filter there
and your red filter there. Most important you have your blocker lens
to occlude one eye
tojust ensure there is no light able to pass through the blocker, that's perfect
now on this side marked by the S are your slits
we have a pair of those, slightly thicker one and that's your thinner one there, a pair of slits
you have your CD lens there
and also most importantly we have a pinhole lens there are checking macular function.
Cuts out the peripheral light and focuses light just the macular area and the fovea
okay let's have a look here so you have a little piece of swiss cheese,
just kidding that is your lens cloth there
it looks as though we have some spare lenses here
that'll need looking at on the focimeter because the markings have eroded
and we just have some old lenses here, not very clean, a bifocal there
got a thick lens there so these dummy lenses aren't going to serve any purpose
let's have a look at this other spare lens, that is a plus 0.25 spherical lens so that is a spare
okay now I also note that you are missing some lenses from the set,
in particular you're missing all of your prism lenses here ranging from half a prism dioptre
to 20 prism dioptres, so I hope you've got a prism bar for the clinic,
you're missing some of your minus cylindrical lenses here from -6.50 to 8
dioptres there and you are also missing
quite fair amount of convex lenses here in the high range, no problems in your mid to lower range
and just over here we're missing one or two
concave lenses, minus lenses there
okay so I'm just going to spend a few moments selecting some lenses at random for review
so I'm going to start with the minus cylinders
we have your minus 0.50's there
minus 0.7 fives, your minus one
one two five and just looking at this set of lenses here, good there but you have
crack on the minus 1.50 cylinder there, cylindrical len,s that's going to need
replacing there
okay minus 1.50 1.75 minus two cylinder 5 to 15.
five onto the small apertures three two five fifty fifty four
5.5 5.50 all the way up to minus six cylindrical lens there, lovely
let's have a look at the plus cylinders so note how they start at point one two five dioptres
rather than most common trial then sets that start at Plus 0.25 or 0.25 in general
sorry plus our 50 plus
56.
okay we have a complete set there
okay so we ranging from 0.125 to 20 dioptres
so it's
a very expansive power range, so look at your concave lenses,
just checking the powers. that the lenses are in the correct slots
five one fifty five two two five
missing 3.50 3.75
4.5 50. five five two five fifty five seven five minus six missing the minus six fifty
seven point five eight nine ten eleven eleven fifty going in half dioptre steps here all
the way to minus 17 and we make one dioptre jumps 18 19 to minus 20 dioptres, marvellous
let's have a look briefly the plus convex lenses
we have a replacement large aperture lens there
which is a 4.75
five seven five six plus six fifty seven
nine ten 11. 12 plus 13 2 14's 250 16 17 18 2 19's and 2 plus 20s
these are your high plus lenses, certainly magnify the image you're looking at, plus lenses magnify
and the minus 20 high minification lenses
shrinks in size there
someone who's long-sighted shall require plus lenses
to correct their prescription, the optical error, someone who's short-sighted shall require
minus lenses from here and if you have astigmatism, which can happen in conjunction
with plus or a minus prescription, you have your cylindrical lenses here
with your markings here so you can correct the astigmatism at the right axis. Those are
your minus lenses. Some optometrists work in plus cylindrical form and others work in minus
cylindrical form. Excellent so I am very impressed with this lens set
so much so I'm going to make you an offer for the set and the accessories
all right let's have a little look
right so we have to take into account a little bit about the condition and some of the missing
lenses and that the small apertures aren't fully complete I'm going to make you a cash offer
I'm going to say 20.
40 60
80 100 her majesties 20
40 60
70 80 90
200 British pounds for the full set, would you like to take the offer?