What condition is primarily associated with cloudy or blurred vision due to lens changes?

Cataracts are primarily associated with cloudy or blurred vision that results from changes in the eye's lens. When a cataract forms, the clear lens of the eye becomes cloudy, interfering with the passage of light and leading to diminished visual clarity. This condition develops gradually and can significantly affect daily activities such as reading, driving, and recognizing faces.

While asthenopia refers to eye strain and discomfort, it does not specifically relate to the lens changes characteristic of cataracts. Low vision encompasses a broader range of vision impairment conditions and is not limited to the clouding of the lens. Aniridia is a genetic condition characterized by the absence of the iris, which does not pertain to lens opacity or clarity issues. Therefore, cataracts are distinct in their direct association with lens changes that result in cloudy or blurred vision.