Although lenskart is a very good choice if you want to buy eyeglasses or sunglasses, they also offer first frame free. There service is also good.
But there are some problems with lenskart such as there is no option for cancelling order and there lenses costs too much as that of frames.
Therefore I would say it is not a good way to buy glasses for yorself, either you can buy glasses offline for better convinience.
I ordered a eyeglass with frame today by mistake and now I am not able to cancel my order.
Thats why I would say worst service by lenskart.