In CVP analysis, the contribution margin is the dollar amount remaining after deducting variable expenses from sales revenue. The unit contribution margin is the amount that each unit of sold product contributes. In this example, the unit contribution margin is $50 (price of $100 minus variable cost of $50).
Vision Problems in the U.S. estimated the population with glaucoma to be 2.7 million in 2010. This number is estimated to be 2.86 million in 2014, and will increase by nearly 50% to 4.3 million by 2032 and by more than 90% to 5.5 million by 2050.
Prevalence and incidence statistics for Glaucoma: See also prevalence and incidence page for Glaucoma. Prevalance of Glaucoma: 2,000,000 people are visually impaired by glaucoma in the US (Research to Prevent Blindness, NISE, NSF) Prevalance Rate: approx 1 in 136 or 0.74% or 2 million people in USA [about data]