Here are few of the ways in which glare can be reduced from LEDs:
Use of microprismatic technology to develop special diffusers that disperses light from individual LEDs. This system gives out homogeneous light with optimum levels of contrast avoiding any direct or reflected glare.
Design of secondary reflectors systems; where the primary reflector, which will hide the view of the LED and direct the light into the secondary reflector that will distribute the light in the intended way.
Use of a combination of TIR (total internal reflection) lenses / collimator lens, which that produce a parallel beam of light, and a facetted lens. This combination will distribute the light beam as intended.