Community Eye Health Journal » Test your knowledge and understanding

Comm Eye Health Vol. 29 No. 96 2016 pp 78. Published online 03 March 2017.

Test your knowledge and understanding – Neuro-ophthalmology

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This page is designed to help you to test your own understanding of the concepts covered in this issue, and to reflect on what you have learnt.
We hope that you will also discuss the questions with your colleagues and other members of the eye care team, perhaps in a journal club.

To complete the activities online – and get instant feedback – please visit www.cehjournal.org

Is this a sudden onset of a 6th nerve palsy or a longstanding esotropia? This boy may have a longstanding right esotropia (if he is looking straight) or a left 6th nerve palsy (if he is attempting to look left).

1. Anisocoria:

May be due to an oculomotor (3rd nerve) palsy

May be due to bilateral optic atrophy

May occur in association with partial ptosis

May be due to mydriatics

May be associated with heterochromia of the iris

Question 1 of 3

2. Homonymous hemianopia:

Means loss of field of vision in one eye with normal visual field in the other eye

May be due to a stroke (CVA) affecting the occipital cortex

Can cause difficulty in reading, eating and driving

May be due to an orbital lesion causing proptosis

May occur during a migraine attack

Question 2 of 3

3. Diplopia:

May follow a head injury with reduced abduction on eye movements

Can be due to myasthenia gravis

If it persists when one eye is closed, then it is due to a lesion in the brain

May be associated with proptosis

The separation of images is greatest in the direction of action of the paralysed muscle

Question 3 of 3

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