Hi
Sorry but I cant really say what this is. You are right to note that if its not in the centre of the pupil it can't be a cataract in the lens. Eyes are delicate structures and it would be best to get this checked by a vet in case there is an infection needing treatment.
Cathy Wickenden BVet Med MRCVS
Barton Lodge Veterinary Centre
1 Midland Road, Hemel Hempstead, Hertfordshire, HP2 5BH
Tel: 01442 216048 24 hours
[
www.bartonlodgevets.co.uk]