Revision Cards Flashcards
What is optic neuritis?
inflammation of the nerve at the back of your eye (which sends signals to your brain)
What is the association between optic neuritis and MS?
Whilst optic neuritis can be linked to MS, most patients who have optic neuritis for the first time do not develop MS.
(but we do need to exclude this with further tests)
What is the prognosis of optic neuritis?
Most patients’ vision does improve, but it may not always return completely to normal.
Research shows that patients’ vision tends to recover the same whether or not they’re treated
Should start to notice some improvement in 2-3 weeks, with most improvement by 6 months. The pain should start to ease in next few days
Ix/Mx of optic neuritis?
Neurology referral (MRI brain and spine)
Discuss steroids with consultant
Followed up by neuro-opththalmology
What is papilloedema?
swelling of the nerves at the back of the eyes, caused by an increase in pressure inside the brain
Ix/Mx of papilloedema?
Referral to medics and Urgent CT/MRI scan and angiography of brain to exclude a blood clot (CVST)
May need LP afterwards (test where they take a sample of fluid from the spine)
Follow up in neuro-ophthalmology
What is 3rd nerve palsy?
Weakness of the nerve controlling your eye movements and eyelids
Ix/Mx of 3rd nerve palsy?
Referral to medics and urgent CT/MRI head and angiogram to exclude PCA aneurysm
(+/- neurosurgery)
Urgent Bloods to exclude GCA
(+ CVS risk factors)
(orthoptist follow up if double vision persistent)
Visual prognosis of 3rd nerve palsy? (e.g the double vision)
Recovery depends on the cause, but most cases caused by diabetes/vascular recover completely (although some patients may be left with some residual muscle weakness)
What is myasthenia gravis?
Autoimmune condition that affects communication between your nerves and muscles, making your muscles weak and easily tired
NB - it is a lifelong medical condition
Ix/Mx for myasthenia gravis?
Neurology referral (blood test for AChr antibodies, nerve studies, CT Chest for thymoma (15% have), pyridostigmine, steroids, IVIg,). Regular monitoring, as it is a lifelong condition.
Neuro-ophthalmology referral
Orthoptist referral
(Ways to manage ptosis - eye crutches; ways to manage double vision - eye patches, prism glasses)
Prognosis of myasthenia gravis?
It is a lifelong but treatable condition
What is GCA?
Inflammation of the blood vessels in the head, some of which supply the eye
Ix/Mx for GCA?
Urgent blood test (ESR)
USS Temporal Artery
(Temporal Artery Biopsy)
High dose steroids (usually oral if no ocular involvement, IV if ocular involvement - but discuss with consultant/rheum)
Steroid course including tapering lasts 1-2 years. (NB - side effects, BP/sugar monitoring, PPI, Bone protection etc.)
Rheumatology Referral
Neuro-ophthalmology f/u (if AION)
Medical retina f/u (if CRAO)
Prognosis of GCA?
If left untreated, permanent vision loss
Even if treated, the vision lost, if significant already (e.g PL, 6/60), it’s unlikely to recover. Therefore aim is to prevent worsening vision in affected eye and preserve vision in other eye
What is Horner’s syndrome?
Damage to the nerve which helps keep your eyelids open and controls your pupil size.
(Important to identify where the damage is and what’s causing it. some can be serious. Examples of serious causes include..)
Ix/Mx for Horner’s?
Apraclonidine eye drop test (causes dilation) confirms diagnosis
Urgent medical referral for CT angiogram including neck vessels and CXR (less urgent)
What is Bell’s palsy?
Inflammation and weakness of the nerve that controls your face muscles.
We’re not certain what causes it. Some suggestion it could be triggered by viral infection.
Ix/Mx of Bell’s palsy?
Oral steroids (if within 72hrs) for 10 days
Dry eyes - lubricating eye drops during day and thicker ointment at night.
Protect the cornea if unable to close eyes (eye patch during the day, tape eye shut at night)
If cornea concerns - cornea clinic f/u
Prognosis for Bell’s palsy?
Most patients usually recover by 6 months.
NB - face exercises patients can perform to support their muscle function as it gradually returns
What is Acute Angle Closure Glaucoma?
Sudden painful increase in pressure inside the eye, which can cause damage to the nerve at the back of the eye if left untreated
Caused by narrowing and blockage eye’s drainage channel
EMERGENCY
Ix/Mx of AACG?
Measure IOP.
IV Acetazolamide.
Plus all the drops (remaining 3).
Laser treatment to open the drainage channel and reduce pressure - done to BOTH EYES to prevent attacks.
Prognosis of AACG?
Cannot recover optic nerve damage and vision lost
What is POAG?