The invention relates to an acrylic polymer material with high refractive index, particularly an acrylic polymer material which has high refractive index and low dispersion deviation and optionally contains blue-light radiation resistance. The material can be used for preparing medical devices, especially preparing eye medical devices, such as artificial lens, contact lens, artificial cornea, cornea inner ring, cornea inner lens, glaucoma valve, drug controlled release carrier, glasses, goggles, medical device lens, telescope, observation mirror. The invention further relates to a polymerisable yellow azo dye which has a maximum absorption wavelength of about 360-370 nm and has methacrylamide nonsaturated group in the structure, thus the effects of effectively absorbing blue lights and / or ultraviolet rays can be achieved.