Anti-Reflective (AR) lens coating make a significant difference in how bright and sharp the image will be.Using AR coating greatly increase light transmission ,resolution,contrast and color fidelity while reducing reflections,light scattering and glare.Ordinary ,poorly ground and polished optical glass leads to optical defects--reduced resolution at the edges,higher distortion and s smaller field of vision.Lenses and prisms of high-quality optical glass are carefully ground and polished to offer the greatest possible resolution and the sharpest image without any visible distortion.