Prevalence and Incidence of Microcoria, congenital
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Microcoria, congenital as a "rare disease".
More information about Microcoria, congenital is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Microcoria, congenital usually refers to the estimated population
of people who are managing Microcoria, congenital at any given time.
The term 'incidence' of Microcoria, congenital refers to the annual diagnosis rate,
or the number of new cases of Microcoria, congenital diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.