Can indentations at the temple/eye be fixed by filler injections? (photo)

Filler injections can be used to improve hollowness or indentations of the temple area. Restylane Silk is a smooth filler meant for superficial injections and is not appropriate for the temples. Please see an experienced provider to determine which filler would be most appropriate for you. Best wishes.

For temple/outer eye volume, the goal is to use something that is easy to inject and can be evenly spread out - otherwise you will get unevenness and lumps/bumps. 
There are generally two approaches to this area. The first is using a semi-permanent filler like Sculptra. Sculpta is "semi-permanent" as it encourages development of your own collagen over time. Sculptra has been used in this area safely and effectively for years. The alternative approach is to use a temporary hyaluronic acid (HA) filler, like Voluma, which is diluted with saline so that it is more "liquidy". This is reversible with a second injection (if the effect is undesired), but it requires repeat injections about every 9-12 months to maintain the effect.
Its very hard to tell from your single photo, but it appears the Restylane may have been injected too close to the eye, causing a bulge just outside the eye. This should ideally be evened out with some injection farther back, over the whole temple area. The only way to know for sure is to have an in-person consultation with an expert in facial plastic surgery.
Hope this helps. Best, Dr. Cabin

I prefer Sculptra injection for temple hollowing and Restylane injection for volume loss at the lower and outer aspect of the undereyes. See an experience injector for an in person evaluation.