Cataract/ˈkætərækt/ Definition 1 of 2Pro Tip 1/3Medical Condition Understand 'cataract' as a vision issue, not a sudden event like a heart attack. Diagnosed with cataracts, she consulted an ophthalmologist. Pro Tip 2/3Not Just Old Age Though common in seniors, cataracts can occur at any age, even in babies. Surprisingly, the toddler required cataract surgery. Pro Tip 3/3Clarity of Vision 'Cataract' implies blurriness in vision, not complete blindness. Her cataracts made reading fine print difficult.