I wanted to know how to get rid of this glare on my lens, is this corrected using a filter?
Reduce the power of the background light in relation to the overall image.
A Blown up white image in a background should be just barely overexposed. If you are using a histogram on the camera take pictures from darker to lighter untill you just get the overexposure on the white and stop there.
If you are using an incident lightmeter overexpose to 1 or 2 stops the recomended exposition. This is in the case your background is really white If your background is gray you need to use the histogram aproach.
Make sure you have a very, very clean lens.
Increase the distance from your subject to the background.
Make sure you are focusing well. Try reducing the aperture.
But also the image looks like a very low quality lens is being used. A cellphone perhaps? This lenses are not as sharp as a good one.
Compensate any changes in exposing the background to the lighting of your main subject.