<prompt> Lens nuclear degeneration is yellow color because of-LipofuscinUrochromeLipochromeBilirubin  <response>: Ans. is lb i.e., Urochrome Nuclear sclerosis also distorts color vision because of -yellow -brown urochrome pigment, which accumulates in the lens and filters out blue wavelengths of light.-- Eye pathologyo Older nuclear cells lose organelles and cell membranes, with increasing density and dehydration and accumulation of yellow urochrome pigment possible photo-oxidation product,o Pathology shows homogeneity of nucleus , with loss of cellular lamination and increased eosinophilia.o When advanced, it becomes brown brunescent or black cataracta nigra. 