okay i'm just going to take your glasses off you okay
we're going to pop the purple trial frame on today
we're going to do a little bit of retinoscopy all right
just to test where i'll be looking at the light movement
with the retinoscope just trying to determine what your prescription is
which is when we say prescription we mean what you need in your spectacles for your best vision
okay let's pop these in first
don't worry about the vision being a little bit blurry
okay so i'm going to be just sweeping the light
in different meridians as you're looking into the distance
okay i want to maintain arm's like distance there with those lenses keep looking straight ahead
okay keep looking straight at all times i'm going to be holding some lenses in front
keep looking straight
i'm going to use some cylinders now
okay this here is a -1.50
i think we're looking around 170 degrees there
so that cylinder is a little bit too strong
i'm going to halve it and go for a minus 0.75 as you're looking in the distance
okay maybe just up the next increment minus one
cylinder
lovely now that's retinoscopy on the right eye keep looking straight ahead
just moving to the left
may have a little bit of minus sphere in the left compared to plus in the right it's interesting
definitely astigmatism in both eyes
okay i think we're going to go
to the minus 0.50 dioptre sphere keep looking in the distance
yes that's neutralized at about 85 degrees because we may have a cylinder
at around 175 degrees very similar to what we had in the right
okay now this time i'm going to start with a minus one dioptre cylinder keep looking straight ahead
i'll angle the light and sweep up and down there the lens in front definitely more cylinder
than the minus one ret there than what the ret tells us with minus one
okay now we've increased to a minus 1.50
okay almost there i'm going to go to a minus 2
half a unit jump there there we go so ret it looks as though we're seeing more
cylindrical elements come down to minus one seven five
okay so i'll say minus 1.75
so let's remove our working distance lenses there
and around 175 to 180 in the right either okay i'm just going to cover your left eye
like so, increase the illumination
okay as you're looking into the distance of the chart is it looking quite clear it is yes okay
keep looking straight ahead at the lowest row on the chart,
is it clearer with the lens or without? without okay
still looking at the same row, sharper with the lens? oh it's clearer with it this time okay
and the bottom row now better with without or about the same? without.
okay we're just going to make sure that this is definitely more blurred,
that was the initial lens we had a little bit more blurry there? that's a lot more blurry
just through your left eye how's the bottom now looking? it's not as good as it was in the
right. okay let's try and enhance the vision is it still readable or is it the row above?
it's still readable. okay is that row then clearer with the lens or
without? without. okay so that's a little bit of plus let's try a little bit of minus
so with the lens, or sharper without? it's better with
okay so we need to increase the minus power there
has it gone a little bit more clearer now?
yeah that's nice now okay let me know if the next lens
is clear with without or about the same please
without okay so that's the spherical element completed
thank you very much