You should leave with your questions answered and feeling confident of your surgeon's abilities and manner before proceeding with any plans for surgery. Likewise, your surgeon will want to know why you are considering the operation. Your surgeon will also want to know about your general health, medications, and any specific problems such as dryness of the eyes, changes in vision, eye pain, or other eye related symptoms. They may also examine your eyesight, your peripheral vision, and your abilty to make tears. For the upper lids, the surgeon makes the incision right in the upper lid skin crease above your eylashes, so it is very well hidden.
Excess skin is removed.
Then the excess fat is removed as needed. The incision is sewn together with very small suture and usually heals quickly with a very good scar. The same occurs for the lower lids. It depends on whether skin needs to be removed, and other factors. In either case, the incision is very well hidden.