The Applied Knowledge Test (AKT) is a computer based exam for GP trainees in the UK

Visual Loss:

For each of the following select the most like cause from the list below.

1. central serous retinopathy (CSR)
2. retinal detachment
3. anterior uveitis
4. giant cell arteritis
5. ameurosis fugax
6. branch retinal vein occlusion (BRVO)
7. central retinal artery occlusion (CRAO)
8. central retinal vein occlusion (CRVO)
9. angle closure glaucoma
10. primary open angle glaucoma
11. dry age related macular degeneration (dry AMD)
12. wet age related macular degeneration (wet AMD)
13. migraine
14. posterior vitreous detachment (PVD)
15. lower lid entropian
16. vitreous haemorrhage
17. anterior ischaemic optic neuropathy (AION)
18. presbyopia
19. cataract

In this style of question the list is too long to be able to consider each cause in turn. You need to be able to recognise the condition based upon the history given.

Q1. A 56 year old gentleman reports loss of vision in his right eye over the last 3 days. He is normally fit and well. He has noted a black arc appear in the bottom of his vision, which has now enlarged and comes up across his central vision today. He had some floaters in the same eye 3 weeks ago.

Q2. A 56 year old lady calls you at an out of hours service. She complains of a frontal headache for 24 hours. She has been nauseous and vomited once. Her vision has become generally blurred in her left eye, like looking through frosted glass.

Q3. A 66 year old gentleman complains of complete loss of vision in his left eye. He has had a few episodes of visual disturbance in the same eye for a couple of weeks. He also is feeling unwell and has a bad headache and pain in his jaws when he chews food.