What can I do to prevent the internal reflection of blue glasses?

First of all, if you are taking pictures indoors, it is best not to shine on the front of people. You can use the reflected light as the main light, and then adjust it appropriately, so that you can deal with the problem of reflection of glasses well. When shooting outdoors, you cannot take photos directly in front of the light source. It's best to shoot against the light. The surface of glasses is too smooth to form diffuse reflection, resulting in visible reflected light. Adding or subtracting reflective films will increase the light transmittance and correspondingly reduce the reflected light.