Does sunlight make Glaucoma worse?


Does Sunlight Make Glaucoma Worse?

Glaucoma, a common eye condition affecting millions of people worldwide, is largely associated with increased pressure within the eye, or intraocular pressure. But what about environmental factors like sunlight? Does sunlight exposure make glaucoma worse?

Effects of Sunlight on Eyes

Sunlight, essential for many life processes, can have detrimental effects on the eyes when exposure becomes excessive. It can cause photochemical damage, leading to conditions such as cataracts and eye strain. More concerning is exposure to the sun\’s ultraviolet (UV) rays which can cause notable harm to eyes, potentially leading to diseases like macular degeneration, cornea sunburn, or even skin cancer around the eyes. Therefore, protecting your eyes from intense sunlight is always recommendable.

Sunlight and Glaucoma

When it comes to the relationship between sunlight exposure and glaucoma, the evidence is mixed.

Some studies seem to suggest a connection. For instance, scientists argue that excessive exposure to sunlight may lead to an increase in intraocular pressure, thereby heightening the risk of glaucoma. An alternative theory revolves around oxidative stress caused by UV rays, which can damage the optic nerve over time.

However, not all studies back this up, and some even argue a mildly protective effect of sunlight on glaucoma, adding to the controversy.

Given this ambiguity, further research is needed to conclusively determine whether sunlight makes glaucoma worse.

Eye Protection Tips for Glaucoma Patients

Nevertheless, it\’s better to be safe than sorry. Particularly, those diagnosed with glaucoma should take steps to protect their eyes:

  • Wear sunglasses that block 99% to 100% of UV rays.
  • Use hats or visors to shield the eyes when outside.
  • Seek shade during peak sunlight hours (10 a.m. to 2 p.m.).
  • Ensure regular eye check-ups and closely monitor intraocular pressure.


While the jury is still out on whether sunlight truly makes glaucoma worse, it\’s clear that sun protection for your eyes is essential. If you have glaucoma, consult with your ophthalmologist for personalized advice. And remember, protecting your eyes from the sun is just good practice for everyone.

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