In this paper, the interests for microscopy of high-resolution wavefront sensing by QWLSI have been demonstrated : a lateral resolution up to the microscope diffraction limit with 300£400 images, a huge OPD sensitivity of less than 1nm and the implementation simplicity. Indeed, this technique does not require temporally coherent illumination, so it can be used with conventional microscope sources, such as halogen lamps. Furthermore, since the interferogram formation does not depend on the wavelength, broadband sources are suitable for illumination. Therefore, no modification is needed to use QWLSI on a conventional bright-field microscope. Moreover, this makes it not only compatible but also complementary with other imaging techniques such as fluorescence or non-linear techniques.