20/20 Vision Calculator for 2020

This calculator aggregates multiple behavioral and nutritional metrics to generate a comprehensive risk score. First, your overall dietary quality (diet) is computed by combining intake scores from cereals, vegetables, fish, red meat, dairy, olive oil, and alcohol. Next, physical activity levels are quantified using work activity, leisure habits, and sports engagement (activity). Smoking history is evaluated by calculating pack-years using the formula pack_years = (no_of_cigarettes / 20) * smoking_years. Finally, these variables feed into a proprietary risk function to output both a baseline impairment risk and a scenario risk excluding smoking habits.

Imagine a 40-year-old individual evaluating their long-term visual health. Their daily routine includes moderate physical activity (score of 15) and a balanced diet rich in vegetables, fish, and olive oil, resulting in a favorable dietary score. However, they have a 10-year history of smoking half a pack of cigarettes (10 cigarettes) per day. First, we calculate their pack-years: (10 / 20) * 10 = 5 pack-years. Combining this moderate smoking exposure with their activity and dietary metrics, the algorithm evaluates their cumulative risk of visual impairment, highlighting the specific lifestyle adjustments needed to preserve long-term ocular health.

To get the most accurate baseline from your calculation, ensure all dietary and activity inputs reflect your typical weekly habits rather than temporary changes. Prioritize reducing cumulative smoke exposure, as pack-years significantly compound ocular vascular risk over time. Finally, pair lifestyle modifications with routine, comprehensive dilated eye exams conducted by a licensed optometrist or ophthalmologist.