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.
Glaucoma can occur even in young children and infants (Developmental Glaucoma). Occurring before the age of 3 years it is called Congenital Glaucoma and between the age of 3 and 30-35 years it is called Juvenile Glaucoma. Treatment of glaucoma is more difficult in young patients and operation is required more often.