How fast after fillers can blindness occur?

If there is embolization of a gel filler into the central retinal artery during a treatment, change in vision may happen immediately. This is a rare complication of injectable gel fillers that is not associated with microdroplet Silikon1000 - a permanent FDA approved liquid silicone filler. Silikon1000 is also not associated with necrosis, or dead skin from blocking an artery - the size of a Silikon-1000 molecule is smaller than a red blood cell so vascular occlusion or blindness does not occur when used properly. Thank you. Dr Joseph

Hi @Lili786! Although this is a very rare complication, blindness from a vascular occlusion would happen immediately. I hope this was helpful.

It would happen immediately.  Very rare though and even more so when the doctor uses a cannula to inject rather than a needle.  

This is extremely rare, but it would happen immediately. It will take 1-2 weeks for final results after fillers. I recommend getting a formal evaluation with a cosmetic dermatologist. Best, Dr. Emer

This is a very rare complication but can be limited by correct techniques, cannula usage and placement . If it happens it’s usually an  immediate occurrence 

If a rare occasion of an accidental filler being injected into a blood vessel occurs, the patients lose their eyesight practically mediately. I hope this does not happen to anyone and good luck from New York City

Usually, blindness will begin to occur within the first hour, if it is to occur.  It is very rare, however.

Thanks for your question. Blindness as a filler complication is very rare and most often associated with filler placed in between the brows or very close to the nose, the "danger zones". If it were to occur, it would be immediate onset, not hours and days later.
Best,
Lisa Vuich, MD