Holistic Learning Objectives Exam 3 Practice 2026 - Free Holistic Learning Practice Questions and Study Guide

Cataract formation is driven by damage to the lens proteins from oxidative stress and metabolic changes that build up over time. UV exposure directly damages lens proteins through photooxidative processes, increasing the risk. Smoking adds a surge of free radicals and reduces antioxidant protection in the eye, accelerating lens aging. Diabetes alters lens metabolism, leading to osmotic and biochemical changes that cloud the lens.

Alcohol use, while potentially associated with nutritional deficiencies or liver-related health issues, is not typically listed as a direct contributor to cataracts in standard risk-factor guides. In the context of this question, alcohol use isn’t considered a direct, established risk factor, whereas UV exposure, smoking, and diabetes are.