Pupil reflexes

Question 1

How is an RAPD noticed on the affected side?

Answer 1

Swinging light test - when light is shone in eye, both should constrict briskly, then relax a little each time the light is swung to them
When light is swung across to affected side, both pupils dilate

Question 2

Where in the visual pathway is the pathology that causes an RAPD?

Answer 2

Pathology localised to visual pathway before the chiasm (optic nerve or retina)

Question 3

What pathologies could cause an RAPD?

Answer 3

Large retinal detachment
Central retinal arterty or ischaemic central retinal vein occlusion
Optic nerve ischaemia
Optic neuritis, compression or asymmetric glaucoma