Does lower blepharoplasty change the shape of eyes and make eye shape look smaller?

More details about your surgery is necessary.  Did you have fat grafting or redrawing to the lower lids?  This may represent the fat placed in the area.

A chalazion is essentially a clogged oil gland along the lash line. These usually resolve on their own, but sometimes the chalazion encapsulates itself and becomes more of a cyst instead of a stye. Since yours has been there for so long, it is most likely cystic and should not be considered...

It looks like you have lower lid malposition, and from your description this I likely congenital (aka you were born with it). This isn't what necessarily lends to an "Asian" eye though. You can undergo a procedure where the lower lid is repositioned, but bear in mind this will reduce the show of...