Caution should always be the order of the day with fillers between the eyes as all of the frightening side effects you mentioned are possible. They are much more likely if the fillers are injected deeply, bringing pressure on blood vessels in the area. Superficial fillers, like collagen are generally safer, but hyaluronic acid fillers can be used if they are injected superficially. Botox, if it flattens out the muscles, may give sufficient improvement to avoid the fillers altogether. The donut effect is usually caused by attempts at over correction.





