People don’t buy glasses that often. A single pair can last a long time. So even tho gross margins can be rich, the annual volume may not cover the fixed cost

People don’t buy glasses that often. A single pair can last a long time. So even tho gross margins can be rich, the annual volume may not cover the fixed cost of marketing, r&d, etc. and don’t forget the optician isn’t really making money from the checkups, it’s the glasses and contacts.