Test with Christmas Lights Shows Astigmatism

Gazing at Christmas tree lights can serve as a simple test for astigmatism, a common vision issue affecting about 33% of Americans. If the lights appear streaky or beam-like instead of distinct spots, it may indicate the condition, which can lead to blurred vision, headaches, and eye strain, especially after prolonged screen time. Astigmatism occurs due to an irregular oval shape of the lens or cornea, causing light to focus unevenly on the retina, resulting in distorted vision. It is often hereditary, but can also develop later in life due to injury or age. Home tests, such as the 'astigmatism fan' chart, can help identify potential symptoms, although a formal diagnosis should be made by a healthcare professional. Managing astigmatism can involve corrective lenses or laser surgery, and failing to address it may lead to more severe issues like keratoconus.