Sunglass 3D model is not placed on face

Hello Team,

I need a help on, i have created my 3D sunglass model and also used a library 3D sunglass model. However when i open WebAR , it is not showing on exactly on my eyes when I moved my head and rotate, tail part of glass showing on my nose when I move my head.

I have uploaded 3 attachments you can see output.

I have made enough settlements on x,y,z direction and resize the sunglass but not working as expected.

Thanks in advanced.

Please check attachment PNG PNG PNG