Opacification of the lens of one or both eyes, which can lead to decreased visual acuity and visual distortions
Most commonly due to normal age related changes, however they can also be caused by eye trauma, exposure to sunlight or radiation, malnutrition, corticosteroid use, and other pathologic processes
By age 80, approximately 50% of Americans have been diagnosed with one or more<unk> 
Additional risk factors for<unk> include diabetes, smoking, prolonged exposure to sunlight, and alcohol use
Typically a non-emergent pathology and can be managed with outpatient ophthalmologic surgery on a routine basis.
With the exception of traumatic<unk>  vision loss from<unk> is typically not acute; rather, develops over the course of months to years.
With the exception of traumatic<unk>  vision loss from<unk> is typically not acute; rather, develops over the course of months to years.
Cataracts
Painful
Red eye 
Arteritic anterior ischemic optic neuropathy
Ocular palsy
Optic neuritis
Papilledema
Temporal arteritis†