Will the eye shape be changed with a Midface lift (MFL) performed from incision under the eyes?

A Mini Facelift can usually be an option on most realistic patients anytime after the age of 35-40. It really depends on your anatomy and genetics. It is best to talk to your surgeon because everybody has different techniques and recovery time is usually based on a number of factors. 
I strongly feel that it's very important to have an honest conversation with your surgeon about your particular situation, lifestyle, work environment and specifically which procedures you're having done so that you both have the most honest answer about your recovery and are realistic with expectations and results.
Surgery is not for everyone. In today's day and age, there are many nonsurgical options to consider although surgery usually gets the most improvement specifically of the jowls.
I would recommend that you see a board-certified plastic surgeon in your area that is a member of both ASPS & ASAPS and performs a lot of facelifts but also offers all the nonsurgical options such as injectables and laser treatments. Go over your concerns with them and make sure above all, you walk out of there with several options and an idea of the pros and cons to each of them as well as realistic expectations. 
I hope this helps and wish you all the best in your surgery and event. If it does, please take a moment to up vote this answer on the “respond” button on the top right.  

The midface lift approach is a good option for those who have simple descent of the midface and in particular the malar fat pad. When skin resection is necessary, this may need to be carried to the undereye. When this is done, it may alter the appearance of the lower lid (however, perhaps not in a bad way). I would look at before and afters from your surgeon to get a sense of what is achievable with this technique.

The transblepharoplasty incision midfacelift sounds like an elegant approach. And it is. You really can technically lift the midfacial tissues through this minimalist approach. However, just because you can doesn't mean that you should do it all the time. The procedure is know for a high rate of complications even in the best of hands. These include eyelid complications, as you have mentioned, as well as the fact that you are pulling the thicker cheek skin onto an area that requires very thin skin. There are other, lesser invasive methods to achieve a mid facelift, and you should consult with a competent and experience facelift surgeon. I have performed a midfacelift as you describe, but usually to achieve a mild improvement in appearance when I'm already doing a lower blepharoplasty.

HI Amber, It depends on the surgeon and their familiarity with the procedure. I will say that I have seen some fairly scary photos at meetings with type of technique and I personally would not perform a facelift that way. I do not think that you can get an adequate neck lift at all if you try to do a full facelift this way.Best,Dr. Christine Rodgers

Hello, thank you for your question. There is not just one facelift procedure, but a whole range of facelift procedures. These different techniques have been developed over the years, involving different incisions and lifting the skin to varying degrees. A facelift may also involve the tightening of certain muscles and tissues, or liposuction of areas such as the jowls or chin. It is important to choose a highly skilled and experienced certified plastic surgeon to match your goals and skin type with the appropriate surgical techniques.