Why Cataracts Happen and How to Protect Your Vision

If your vision has started to look cloudy, blurry, or dim - almost like you’re looking through a foggy window - you may be experiencing the early signs of cataracts. Cataracts are one of the most common causes of vision changes, especially as we age. But what exactly causes them, and is there anything you can do to reduce your risk?

At Reed Optical, we believe that understanding your eye health is the first step toward protecting your vision. Let’s take a closer look at what causes cataracts and how they develop.

What Is a Cataract?

A cataract occurs when the clear lens inside your eye becomes cloudy. The lens is responsible for focusing light onto the retina, allowing you to see clearly. When it becomes clouded, light cannot pass through as easily, leading to blurred or distorted vision.

Cataracts typically develop gradually and may not cause noticeable symptoms at first. Over time, however, they can interfere with daily activities such as reading, driving, and recognizing faces.

The Most Common Causes of Cataracts

Aging - The most common cause of cataracts is natural aging. As we get older, the proteins in the eye’s lens begin to break down and clump together, forming cloudy areas. Age-related cataracts often begin developing after age 40, though symptoms may not appear until later.

UV (Ultraviolet) Exposure - Long-term exposure to the sun’s ultraviolet (UV) rays can accelerate changes in the lens. Without proper eye protection, UV radiation can contribute to the earlier development of cataracts. Wearing high-quality sunglasses that block 100% of UVA and UVB rays is one of the simplest ways to protect your eyes.

Diabetes - People with diabetes are at a higher risk of developing cataracts. Elevated blood sugar levels can cause changes in the lens, leading to swelling and clouding over time. Managing blood sugar levels effectively can help reduce this risk.

Smoking - Smoking increases oxidative stress in the body, including in the eyes. This damage can speed up the breakdown of lens proteins and significantly raise the risk of cataract formation.

Eye Injuries or Trauma - A direct injury to the eye can cause what’s known as a traumatic cataract. These may develop shortly after an injury or even years later.

Certain Medications - Long-term use of corticosteroids (often prescribed for inflammatory conditions) has been linked to an increased risk of cataracts.

Genetics - Family history can also play a role. If close relatives developed cataracts at an earlier age, you may be more likely to experience them as well.

Are Cataracts Preventable?

While aging itself cannot be prevented, certain lifestyle choices can help reduce your risk or slow the progression of cataracts:
 

• Wear UV-protective sunglasses and wide-brimmed hats outdoors

• Avoid smoking

• Manage chronic health conditions such as diabetes

• Eat a diet rich in antioxidants (leafy greens, colorful fruits and vegetables)

• Schedule regular comprehensive eye exams

Early detection is key. Even if your vision seems fine, routine exams allow your eye doctor to monitor subtle changes in the lens before symptoms become disruptive.

When Should You See an Eye Doctor?

You should schedule an eye exam if you notice:
 

• Blurry or cloudy vision

• Increased sensitivity to light

• Difficulty seeing at night

• Fading or yellowing of colors

• Frequent changes in your glasses prescription

Cataracts are treatable, and modern cataract surgery is one of the safest and most effective procedures performed today. If cataracts begin interfering with your daily life, your eye doctor can discuss treatment options and help determine the right time for intervention.

Protect Your Vision for the Years Ahead

Cataracts are a common part of aging, but they don’t have to limit your quality of life. Understanding the causes - whether age, UV exposure, lifestyle factors, or medical conditions - empowers you to take proactive steps to protect your vision.

Ready to protect your sight? Schedule your comprehensive eye exam with Reed Optical.  Visit our offices in Claremont or Sunapee, New Hampshire. Call (603) 543-3125 to book an appointment today.