RE: FDA approval soon23 Oct 2024 19:18
An orphan disease is a rare disease or condition that affects fewer than 200,000 people in the United States.
Ie the prevalence of the disease = no of people with the condition at a given time- it is not a rate (per year for example)
Also the number of glaucoma surgeries in USA in 2021 was 221,602- ie a bit more than mentioned