hello there, welcome to the clinic, so it's my understanding that you like having the cover test
performed in the clinic so I'm going to take some time to perform a detailed cover test examination,
in the distance and at near, using a various array of occluders and near
vision targets. so let me first start by my hands a little clean
okay so looking at the occluders we have available
the first one is this frosted occluder
okay so we have a little bit of transparency,
so I'll be able to see under the cover as well as looking at the eye that isn't going
to be occluded. so first up I want you to start by looking at the spot
of light in the distance, just have a look at your eyes there and let's start with some occlusion
that's good so that's looking for any squints there,
and I'm just going to jump from eye to eye, keep looking at the spot for me please
looking for any phorias there
excellent and for the near cover test
I'm going to ask you to look at The Groovy Flower there The Groovy Flower
I'll be covering one eye at a time there
and the other
and from side to side
okay so that's the first occluder
next up we have this occluder here with an array of features. scale there for checking pupil sizes
and one on the reverse. a series of pinholes to check pinhole vision
we have a little measuring scale here, taking any intricate ocular measurements there
and this is from the brain tumour charity.
okay so I keep looking at the spot, just focusing on the cover test today, keep nice and steady
if I block the spot just keep looking where it should be
cover the right eye there
and I'm just going to cover from above here, swinging cover test there
and just
using this occluder here, let's have a look what targets we can use. I want you to look at the
beautiful butterfly there, a beautiful butterfly, start by covering this eye
and the opposite eye
and just jumping from eye to eye looking for any phorias there, whether that's exo or esophoria
or a phi movement
does the butterfly appear to move as I move the cover?
okay that's fine, that's the second set completed
next up we have the Shamir occluder here, you have a cross target there, you have two pinholes here
we have a PD measuring scale there
this is the guitar shaped occluder, keep looking at spot again for me please
thank you
and for a near target, can you see the elephant there? can you see the
beach ball on the end of the trunk? keep looking at the beach ball for me
okay and just follow the ball if it appears to move
lovely. three down three to go
next up we have this large green opaque occluded here,
nice little groove there for comfortable handling, quite a large occluder
We have a little hole there for attaching
to a holder or a hook on the wall, for example. and near target
we'll select this one for later so keep looking at the spot
continue looking towards the spot
and keep following the spot
excellent let's find an appropriate near target for you
ah yes one of your favourite targets from the clinic.
can you see Mrs quack quack there? can you see Mrs quack quack? she is between
the vehicle at the top and the star just inferior. so keep looking at Mrs quack quack for me please
a little bit further back, marvellous
a little bit
further back, increase the working distance there
let
me know if Mrs quack quack moves at all during the cover test
that's great
now the next occluder
we have a Ciba vision occluder there,
one of my favourites from the clinic there. you'll notice it's very thin. incredibly flexible.
attachment hole there, pupil measuring scale here ranging from 11 millimetres 3 millimetres
here. a little scale there which you could use to check Iris diameter or vertical apertures
like sp
we have the inches scale here and the millimetres there, so it is a multi-functional occluder.
so keep looking at the spot again
okay that's the distant part completed there. And
for the target I would like you to look at the little budgie there, keep looking at the budgie
and just swinging across there
just going to increase the working distance a little bit
try and conduct this at your habitual working distance
and we have one final occluder for your enjoyment
This occluder comes courtesy of Spa Medicahere
performing NHS cataract surgery and YAG capsulotomy if your implants
require a bit of laser to clean them. we have a scale here and a little repeating scale
just there. okay looking at the spot using the Spa Medica occluder there
a from eye to eye
and finally for a near target here. okay can you see the vehicle there? excellent,
just want you to look at the wheel, at the front of the vehicle there please
okay I'm pleased to say that there are no deviations there, no ocular deviations. no
tropias and no manifest phorias, so I'm going to let you go now, see you in the clinic next time