Can filler cause blindness & when would it occur?

Hi,
Thanks for your question.
Derma filler injections are MEDICAL procedures and should be performed ONLY by medical professional e.g. Doctors expert in prevent/ reduce complications including blindness. Visual loss occurs withing second of injection and for this reason the practitioner must be able to prevent/ recognize/ reduce this risk with immediate intervention.
An expert doctor should be able to identify the Facial vascular danger zones and avoid them to reduce severe adverse events.
These procedure are safe if the facial danger zones are recognized and proper injection techniques and fillers are used in a clinical setting.
I recommend to seek the advice of an expert doctor with extensive knowledge of facial anatomy and proportions and experience in facial assessment, treatments and complications.
Hope this helps,
BW
Dr Fiore

Yes, filler can be injected, under pressure, into a small vessels of the lip and trevel to the blood vessels of the eye or even brain. In that case blindness may occur; usually it happens within few minutes or up to few hours after injection. It is not likely to happen days after surgery? However, ths situation is extremely rare! Hope this helps.

Should it occur, it happens at the moment of the injection. It does not occur hours, days, weeks or months after the treatment. Again while rare, this has happened with injection from any location in the face. It is for this reason, patients are advise to have these treatments with highly experienced physician injectors.