Why Are Blue Eyes More Sensitive To Light?

Smiling glasses girl in park

Have you ever noticed how people with blue eyes seem to squint more in bright sunlight compared to those with brown or green eyes? This is because blue eyes are naturally more sensitive to light due to the amount of melanin in the iris. In this blog post, we’ll explore why blue eyes are more sensitive to light and how to protect them from harmful UV rays.

Understanding Why Blue Eyes Are More Sensitive to Light

The amount of melanin in the iris of the eye determines how much light is allowed to pass through. Melanin acts as a natural sunscreen, helping to protect the eyes from UV radiation. People with darker eyes have more melanin, which means less light passes through to the retina. On the other hand, people with blue eyes have less melanin, which allows more light to enter the eye. This can cause discomfort, sensitivity, and even damage to the eye if exposed to bright light for extended periods.

How to Protect Your Eyes from the Sun and Why

UV rays from the sun can cause serious damage to the eyes, including macular degeneration, cataracts, and cancer of the eye and eyelids. It is important to protect your eyes from these harmful rays, especially if you have blue eyes. Here are some tips to help protect your eyes from the sun:


  • Wear sunglasses that block 100% of UV rays.
  • Wear a wide-brimmed hat or visor to shade your eyes and face.
  • Avoid direct sunlight during peak hours, typically between 10am and 2pm.
  • Use a sunscreen with an SPF of at least 30 on your face and around your eyes.

When to See an Eye Doctor

Our eyes are one of our most precious senses, allowing us to experience the world around us in ways that are impossible without them. But unfortunately, our eyes can also become subject to wear and tear, disease, and injury over time. That’s why it’s so important to take good care of them, and part of that means knowing when to see an eye doctor. There are a few telltale signs that it’s time to book an appointment, including persistent eye pain, blurred vision, changes in your peripheral vision, or new floaters or flashes. Even if you think your vision is “fine,” a regular eye exam can catch underlying problems before they become more serious.

Frequently Asked Questions About Eye Sun Protection

Are sunglasses needed on a cloudy day?

Yes! The sun’s harmful UV rays can penetrate through clouds and cause damage to your eyes. Always wear sunglasses when spending time outdoors, even on cloudy days.

Which sunglasses are the best for blue eyes?

When it comes to selecting sunglasses, it’s important to look for ones that block 100% of UV rays. In addition, polarized lenses can help to reduce glare and provide clearer vision. Speak with your eye care professional to determine which type of sunglasses are best suited for your eyes and lifestyle.

If you have any concerns about your eye health, contact Spindel Eye Associates today at 603-421-6536 to schedule an eye exam or to learn more about our eye services.