Assertion: cataract | /r/Causes | clouding of the lens
Facets:
Source sentences:
text: Since cataracts cause clouding of the lens and are likely to impair vision if not removed, it is important for all individuals with NF2 to have a detailed eye exam by a specialist familiar with NF2.
text: A cataract causes the clouding of this lens, which changes the way light is passed into the eye.