What characterizes cataracts in terms of the crystalline lens?

Cataracts are characterized by a loss of transparency in the crystalline lens of the eye. This occurs when proteins in the lens begin to clump together, leading to cloudiness that impairs light from passing clearly through the lens. As a result, individuals with cataracts may experience blurred vision and increased difficulty with night vision, as well as other visual disturbances. The lens normally should allow light to pass through easily, maintaining clarity; however, in the presence of cataracts, this clarity is compromised, leading to a significant loss of transparency that is the hallmark of this condition. Therefore, selection of loss of transparency accurately reflects the changes that occur in the crystalline lens due to cataract formation.