Does getting jaw filler for wider jaw line have a risk of blindness like other parts of the face?

Thanks for the question. 
Blindness due to filler injection is extremely rare but is a risk that you must be aware of. 
It is due to filler be injected into an artery and it passing backwards from there to the ophthalmic artery where it starves the eye of oxygen. It makes anatomical sense for the arteries around the forehead, glabella and medial cheek to be high risk for this as they communicate over a short distance. If having filler to enhance your jawline, the danger would be injecting the facial artery where it passes over your mandible. Although, this could cause localised tissue ischaemia/necrosis, I think it is very unlikely that this would cause blindness. 
I would suggest seeing a certified plastic surgeon to discussing yiur options and the associated risks.
Good luck!
Dr Chris Macdonald
CRM Aesthetics

Hello Meena and thank you for your question. You have a valid concern with fillers however the risks are very minimal. Also, injecting the lower face is tricky and might not always lead to satisfactory results. If you decide to proceed with the injectables consult with a plastic surgeon or another physician who does injectables every day and is well aware of the facial anatomy. I hope this helps and wish you all the best.