Abnormal lens morphology Cataract UMLS:C0086543 SNOMEDCT_US:128306009 Cataracts HP:0010700 Cloudy lens HP:0007825 Lens opacities HP:0001113 Lens opacity A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule. SNOMEDCT_US:247053007 SNOMEDCT_US:193570009 Clouding of the lens of the eye UMLS:C1510497 HP:0000518 Fyler:4865 Note that some ophthalmologists call any opacity in the lens a cataract, while others restrict the term to lens opacities that impair vision. We use the term to refer to the first meaning (any lens opacity).