<unk> <unk>  is an age-related change in the density of the crystalline lens nucleus that occurs in all older animals. It is caused by compression of older lens fibers in the nucleus by new fiber formation. The denser construction of the nucleus causes it to scatter light. Although<unk>  may describe a type of early cataract in human medicine, in veterinary medicine the term is also known as lenticular sclerosis and describes a bluish-grey haziness at the nucleus that usually does not affect vision, except for unusually dense cases. Immature senile cataract has to be differentiated with<unk>  while making its diagnosis.
Nuclear sclerosis
Nuclear moulding
Scalding
Contour threads
Hyperkeratinization
Nuclear atypia
Sclerosis 
Granulation