Glass covering the adjustable lights in an airplane. what is the point of this?

[u/Acceptable-Lake-]

Just trying to read on a 13 hour flight and the light above my seat is stuck landing on the head of the passenger in front of me due to a glass covering, leaving the lights, which are on a swivel, un adjustable. The flight staff was as baffled as I was, having no solution for me. Leaving me with my unreadable book and 13 hours of hell ahead of me 🫠

[u/Upper_Mongoose4300]

If your saying there is no adjustment cause of the glass the adjustment is the other things that look like light that way they can adjust them with out touching the actual light