What's important though, is to pick up those who do not fall into the trauma category, as there are some classic systemic diseases and genetic syndromes that can cause lens subluxation. Also make sure there is no pupil block glaucoma taking place, as this can occur in subluxation. Marfan's is probably the most famous of the non-traumatic causes.
Seizures can be present.
There are many other diseases and conditions that can cause subluxation. FTA-ABS, as well as RPR are advised.