Specific learning disorders, i.e. dyslexia, dysorthographia, dyscalculia and dysgraphia, can be screened as early as in primary school.
Often, however, despite struggling considerably with their studies, many students with these disorders arrive at university without ever having undergone a specialist assessment to ascertain the true nature of their difficulties.
If you suspect that you have a specific learning disorder, you can try filling in the Adult Reading History Questionnaire by Lefly, Pennington, Bruce (2000).
This is not a diagnostic tool but may provide an indication of whether you should pursue further specialist investigations.
If you wish, you can request a specialist assessment from your Local Health Authorities or from specialists or private centres that deal with diagnosing SLD in adulthood.