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The first 25 slides, exactly as they appear. The full deck has 38 content slides.
Ophthalmology
Functional Visual Loss
Built from Khurana — Neuro-Ophthalmology
What’s inside
4 sections · 38 slides
Overview
- What this topic is about
What Functional Visual Loss Is
Two very different reasons the eye 'fails' with no disease
- Functional means 'no organic cause found'
- Conversion disorder — an unconscious process
- Malingering — a deliberate act
- Conversion disorder vs malingering
- How common is it?
- Classifying non-organic symptoms
Spotting It in the Clinic
A simple examination usually settles the question
- Malingering is a diagnosis of exclusion
- Functional ocular symptoms
- The single most useful test: the pupil
- Choosing tests by the presenting complaint
- Binocular profound loss: just watch the patient
- Reflex and proprioception tricks
- Making the eyes betray intact vision
- Objective proof: the visual evoked potential
- Monocular blindness: dissociate the two eyes
- The 4 prism-dioptre prism test
- More prism and diplopia tricks
- Fogging and pinhole tests
- Colour-dissociation and stereopsis tests
- The classic functional field defect
- Tunnel vs funnel — why distance matters
- Perimetry patterns that give it away
- Clues on automated perimetry
- Non-organic patterns on automated perimetry
Differential Diagnosis & Management
Do not miss a real disease hiding behind 'functional'
- Organic disease can masquerade as functional
- Efferent mimics and ancillary testing
- Managing conversion disorder
- Managing malingerers and follow-up
- Three things to take away
- Why does absence of a RAPD help in unilateral 'blindness'?
- References (1/2)
- References (2/2)
- Neuro-Ophthalmology