What are these and what are they for? The girl sitting across from me had them on all her fingers on both hands.

What are these and what are they for? The girl sitting across from me had them on all her fingers on both hands.
Answer: Oval finger splints for treating: arthritis, boutonniere deformities, crooked fingers, fractures, hypermobility (Ehlers-Danlos syndrome), lateral deviation, mallet finger, swan neck, trigger finger, and trigger thumb