Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Neuro-ophthalmology - Diabetic Retinopathy
Document related concepts
Transcript
Neuro-ophthalmology [email protected] a semi-interactive tutorial to be used with the online files; downloaded versions can be downloaded from here into the same folder. They are .exe files and should play on all laptops Neuro-ophthalmology Dilated pupil/ptosis/divergent eye = 3rd n palsy Vertical diplopia = 4th nerve palsy One eye convergent = 6th nerve palsy 7th nerve palsy Dilated pupil/normal sight = adies pupil Dim vision one eye = optic neuritis (rarely tumour) Field defects 3rd nerve palsy Common symptoms, 3rd button 3rd nerve palsy 3rd nerve palsy Online, chronic eye disease, section 3 (3rd ‘?’ down on left) 2mb Folder similar All recti except superior oblique and lateral rectus paralysed 4th nerve palsy Online, chronic eye disease, section 3 (3rd ‘?’ down on left) 2mb Folder similar Superior oblique palsy: vertical diplopia 6th nerve palsy Online, chronic eye disease, section 3 (3rd ‘?’ down on left) 2mb Folder similar Lateral rectus palsy 7th nerve palsy Try and think, in pairs, 1 minute Causes Problems What is the route of the 7th nerve? 7th nerve palsy lesions Bells palsy, possibly herpes simplex Ramsay-Hunt with rash: herpes zoster Upper motor neurone…forehead symmetrical Detailed description 7th nerve palsy Runs over petrous part of temporal bone… 6,7,8th palsy Herpes zoster: look in ear for vesicles 7th nerve palsy: eye problems Dry cornea can ulcerate Use fluorescein for examination Lubricate +++ Occasionally suture lids closed. Serious problem for acoustic neuroma patients Nystagmus Involuntary eye movement… Slow movement is the ‘problem’ Fast is the recovery If worse looking straight, generally a central lesion If worse looking to one side, generally vestibular online (section 12, double vision and pupil, 3 top ‘?’right) Folder similar Optic atrophy Think, again in pairs, about what may cause optic neuritis Infection, genetic, toxic, vascular, nutritional, other diseases Optic atrophy, photos Optic atrophy, causes Dim sight Reduced visual field Causes Pernicious anaemia…B12 deficiency Congenital..eg Lebers Toxic…methanol, smoking, poor diet Optic atrophy, case A 43y woman complains of a mild headache (left forehead). The headache has been present 2 months, and is not getting better. As you listen she tells you the sight is dim in left eye. Examination confirms red colours in the left eye are not as bright as when seen with the right eye. CT scan details: (Further examination may show a pale optic disk and afferent pupillary defect, and visual field defect, but even without these findings a CT scan is needed.) Field defects Quiz…with each lesion, what would the field draw the field…in pairs. Answers Online (tiny) folder Here 1 Here 2 Here 3 Here 4 (small, lower occipital)
