How Astigmatism Affects Your Perception of Lights: 1 Minute to Understand the Visual Disturbances Caused by Astigmatism

Astigmatism is a common refractive error that affects how the eye focuses light, resulting in blurred or distorted vision. For people with astigmatism, the cornea (the clear front surface of the eye) or lens isn't perfectly round but rather shaped more like a football than a basketball. This irregular curvature causes incoming light to be focused unevenly on the retina, which is the light-sensitive layer at the back of the eye, creating multiple focal points instead of one. As a result, individuals experience symptoms such as headaches, eye strain, and most noticeably, unique visual effects around lights—especially at night or in low-light conditions.

Those with astigmatism often report that lights appear to have "halos" or "starbursts," with rays or streaks emanating from the light source. For example, streetlights may seem to have fuzzy edges, and oncoming headlights during night driving can produce a glaring, sparkling effect, making it difficult to see clearly. Not only do these visual artifacts impact safety and comfort, but they also influence how astigmatic people interact with illuminated spaces, whether at home, the office, or public venues.

As a designer, I often consider how lighting will be perceived by individuals with vision conditions like astigmatism. A well-designed interior can minimize discomfort associated with bright artificial lighting by using diffused fixtures, adjustable lamps, or layered lighting schemes. If you're thinking about how light impacts your space—perhaps you're exploring different room layouts or even considering a redesign—tools that allow for precise adjustment and visualization, such as a room planner, can help ensure everyone enjoys a comfortable, visually balanced environment adapted to their needs.

Tips 1:

If you have astigmatism, opt for soft, layered lighting over harsh, direct sources. Use dimmable fixtures or lamps with frosted covers to reduce glare and minimize light-based visual distortions at home.

FAQ

Q: What causes astigmatism?

A: Astigmatism is primarily caused by an irregular shape of the cornea or lens, which prevents light from focusing evenly on the retina.

Q: How does astigmatism change the way I see lights at night?

A: Astigmatism may cause lights to appear streaky, blurry, or surrounded by halos, particularly in low-light or at night.

Q: Can glasses or contact lenses correct astigmatism?

A: Yes, both glasses and contact lenses can be specially prescribed to compensate for the irregular curvature and provide clearer vision.

Q: Are there treatments available for astigmatism besides corrective lenses?

A: Some surgical options, such as LASIK, can reshape the cornea and potentially correct astigmatism.

Q: How should I plan my home lighting if I have astigmatism?

A: Use diffused, adjustable lighting, avoid bright glare, and consult an interior designer to create a space tailored to visual comfort.