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Screening for Diabetic Retinopathy This presentation lasts approximately 10 minutes. Diabetic Retinopathy. Diabetic retinopathy is damage to blood vessels and tissue in the retina (the layer at the back of the eye) caused by diabetes.
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This presentation lasts approximately 10 minutes.
(OPTIC DISC 1.5mm)
Optic Nerve (Optic Disc) - The nerve which connects the eye to the brain, and brings the retina its main blood supply.
Using a Digital Camera
First, your vision will be tested using a standard wall chart, the same sort that you use when you visit your optician.
dilate your pupils and allow a clear view for photography.
This may sting at first.
IT IS NOT ADVISABLE TO DRIVE FOR UP TO 4 HOURS AFTER THE EXAMINATION AS THE EYE DROPS CAN CAUSE TEMPORARY BLURRING OF VISION AND SENSITIVITY TO BRIGHT LIGHT!
It is advisable to bring sunglasses with you to wear when you leave.
the screener will take 4 photographs,
2 in each eye.
The screener will then show you the photographs
and point out any signs of diabetic retinopathy.
The results will be sent to your GP.
A letter outlining the results of the screening appointment and any further action required will be sent to you within 4 weeks of your appointment.
Are small red spots.
These are caused by
a swelling of very
small capillary vessels in
the retina, they are an
early sign of diabetic
Micro aneurysms should be monitored every 12 months.
Haemorrhages - Are red blots varying in size and shape.
These are small bleeds within the retina or near the
surface. There are several types .
Haemorrhages should be monitored every 3, 6 or 12 months depending on severity.
Hard exudates -
Shiny pale white
or yellow sharp
These are fatty
by leaking fluid.
Cotton wool spot -
White and fluffy
These are scarred
nerve fibres near the
surface of the retina.
Venous loop -
A loop in a blood
vessel, caused by
poor flow of blood.
These signs should be assessed by an ophthalmologist.
These appear wispy and
fragile. New blood
vessels form as a result of
existing vessel damage.
These vessels are
extremely weak and tend
to rupture very easily.
This causes scarring and a
build up of blood within the
New vessels require laser treatment.
This applies to most of the signs we have
already looked at when they occur on
the macula, close to the fovea.
Early maculopathy requires close monitoring. With hard exudates laser treatment is needed.
Panretinal Photocoagulation (PRP) - applied to treat proliferative diabetic retinopathy.
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