Is my radix too low, and would I benefit from a filler? (Photo)

If you prefer the after photo that you have created then a dermal filler is an excellent option in helping to create the nasal bridge that you have photo shopped for yourself.  Your radix is not extremely low and though there are many aesthetic "rules" rhinoplasty surgeons follow to help create the nose that patients desire, there is also personal preference which must be taken into account.  A consultation and discussion with an experienced rhinoplasty surgeon would be an excellent way to express your desires.  I will tell you that if performed correctly, and perhaps with the use of spreader grafts,  lowering your nasal dorsum further should not compromise your airway.

I honestly think the radix is fine. If you think it is too low, an experienced injector can fill the area to elevate the radix. Please make sure the physician has experience injecting this area, as it can be dangerous if done by someone with little experience.

thank you for the picture.  I agree, that there is still a bit of dorsal projection giving you a slight hump.  honestly, fillers can work very well to help give you a great result very close to your simulated after picture.  either restylane or juvederm ultra would work exceedingly well to accomplish what you want and give you close to a year of results.  you may want a touch up at 6-9 months, but often i find that patients who have a "liquid rhinoplasty" are happy for around a year or so.  best of luck!