What are age concerns for blepharoplasty? What is the ideal candidate's age? What procedures are best for a 30-year-old? (Photo)

Age should not be a factor by itself.  You appear to be a good candidate for conservative upper blepharoplasty (skin removal only). Best to see an oculoplastic specialist in person for evaluation.

While it is wise to be cautious performing eyelid surgery for perceived excess skin (blepharoplasty) in a young person, it is not contraindicated.  Usually eyelid surgery is performed for the purposes of restoring the eyelid to a more youthful appearance.  In your case, given that you are young, the procedure would be more similar to a rhinoplasty, where you are improving the appearance of something that has not necessarily aged.  The patient has to be prepared that the outcome will not necessarily be a turning back of the clock, but rather a change in their appearance even from when they were younger.  Nothing inherently wrong with that, but it is wise to consider carefully what your goals are. 

I would have no concerns about performing in upper lid blepharoplasty on someone in their 30s if they had an excess of upper eyelid skin. However I think this is the wrong operation for you. You appear to have droopy brows and would benefit from a forhead lift which would correct upper eyelid skin excess as well as the droopy brow. See a very experienced surgeon for this otherwise you'll end up with the wrong operation.