Thanks for query,
There is no relation of increasing weight and eye surgery
You weight is very less.
Please see that you do not have any underlying chronic disease by which you do not put on weight.
if you are alright then,
Take high nourishing food,more milk,fat, carbohtdrate,protein powder.
Take more green veggies,fresh fruits.
Take Iron,b.complex and multivitamin
Ok and bye.