Astigmatism and Street Lights

4 Minute Read

Astigmatism is a common vision disorder that affects between 8 percent and 62 percent of the population, based on various studies. This condition significantly reduces quality of life by lowering visual acuity, increasing glare in 53 percent to 77 percent of cases, creating halo effects around light sources in 28 percent to 80 percent of cases, causing difficulties with nighttime driving in 66 percent of cases, contributing to falls, and leading to dependence on corrective eyewear in 45 percent to 85 percent of cases [1].

Astigmatism reduces visual sharpness and contrast sensitivity, which creates challenges for driving and pedestrian movement during low-light conditions. Street lighting technologies can help address these issues by compensating for the visual distortions, thereby easing the burden on affected individuals and potentially reducing demands on healthcare resources.

A nighttime street scene with blurred lights and halos, illustrating the visual distortion caused by astigmatism for affected individuals.

Astigmatism and Street Lighting: Why Intense Light Poses Risks

Irregular curvature in the cornea or lens causes images to focus in a distorted way, resulting in impaired vision. For people with astigmatism, low-light environments present hazards due to blurred vision, strong glare, prominent halos around light sources, and object doubling.

In darkness, pupils expand to capture more light. Conventional light sources, such as street lamps and vehicle headlights, can intensify focusing difficulties. Instead of supporting clear navigation, these sources produce distracting bright emissions that generate visual distortions and complicate road and path perception. This effect heightens risks during nighttime driving and walking [2].

Urban Environments as Solutions: How Municipalities Can Mitigate Astigmatism Challenges

Astigmatism can be managed through eyeglasses, contact lenses, or surgical interventions. However, individuals who remain undiagnosed or untreated often resort to personal precautions, such as steering clear of intense beams from headlights and street lamps—measures that prove difficult in densely populated urban areas. Relying on familiar paths and scheduling additional time for travel offers only partial relief. Such strategies limit personal mobility and autonomy.

Urban settings can enhance safety and comfort by adopting intelligent adaptive lighting systems.

These systems use dimming controls to limit full-intensity operation to situations where it is required. Under normal conditions, lamps run at lower output levels to deliver uniform illumination across roads and sidewalks. Detection of a pedestrian or vehicle via smart microwave motion sensors or smart infrared motion sensors triggers the lamp controller to raise brightness on the affected fixture, providing clear visibility along the route. Adjacent lamps in the direction of travel also increase in intensity, while those farther away stay at reduced levels. This setup ensures even lighting distribution without creating hotspots, deep shadows, or excessive glare—principles familiar in lighting design where controlled intensity prevents visual discomfort.

Per-fixture dimming is not practical for high-volume thoroughfares but performs effectively in residential districts and park spaces, where it reduces visual strain for those with astigmatism.

Conclusion

Resident Comfort and Municipal Advantages Through Smart Lighting Integration

The Qulon smart lighting system combines multiple technologies into a unified platform that adapts to diverse urban terrains, mounting configurations, and communication standards, delivering operational improvements from initial installation. Adaptive controls yield energy reductions greater than 40 percent, providing a direct mechanism for efficiency gains. When integrated with surrounding conditions, these systems curb light pollution and decrease health risks, including vision-related disorders, for people in illuminated zones [3].

In summary, this offering extends beyond basic illumination for municipalities; it represents a multifaceted strategy that meets several infrastructure and public health goals.