Q: Why does the lens in my glasses keep falling out? Tightening the screw for it doesn’t seem to hold.
A: The frame may need to be repaired or replaced. The screw or its hole might be damaged. The frame might be stretched or bent, or the lens may be a poor fit for the frame. Don’t be tempted to glue the lens into the frame – that’s usually a quick way to ruin the lenses.