Looking at your Christmas tree lights could reveal signs of a genetic health disorder that plagues many Americans, yet even more don't know that they have it.
The main conceptual idea of the text is that observing how your Christmas tree lights appear can potentially signal the presence of astigmatism, a common vision disorder.
If the lights appear as streaks or beams instead of distinct points of light, it could indicate astigmatism, which affects approximately 33% of Americans.
