Explain briefly why on entering a poor lit room, one feels blinded for a short while .

On entering a poorly lit room, one feels blinded for a short while because of the phenomenon of dark adaptation.

1. In this phenomenon, rod cells get sensitive to dim light.
2. Rod cells get broken in sunlight.
3. The regeneration of pigment rhodopsin takes some time after entering the room; that is why one feels blinded for a while.