Cataracts are one of the most common age-related eye conditions, but many patients are surprised to learn that they don’t always affect both eyes in the same way - or at the same time. Understanding how cataracts develop and progress can help you know what to expect and when to seek treatment.

What Is a Cataract?

A cataract occurs when the natural lens of the eye becomes cloudy. This clouding interferes with the way light enters the eye, leading to symptoms such as blurry or dim vision, increased glare from lights, faded colors, and difficulty seeing at night. Cataracts typically develop slowly and worsen over time.

Do Cataracts Usually Affect Both Eyes?

Yes - cataracts often develop in both eyes, but not always equally. It’s very common for one eye to develop a cataract earlier or progress more quickly than the other. This can result in uneven vision, where one eye sees more clearly than the other.

Even when cataracts are present in both eyes, they are usually treated one eye at a time, depending on symptom severity and how much vision is affected.

Why Might One Eye Be Worse Than the Other?

Several factors can cause cataracts to progress differently between eyes, including:

· Differences in sun (UV) exposure

· Past eye injuries or surgery affecting one eye

· Certain medical conditions, such as diabetes

· Use of steroid medications

· Natural variations in eye health

Because of these factors, it’s normal for cataract symptoms to feel more noticeable in one eye before the other catches up.

Can Cataracts Develop in Only One Eye?

While less common, cataracts can affect only one eye. This is more likely if the cataract is related to trauma, inflammation, or a previous eye procedure. However, age-related cataracts typically involve both eyes eventually.

How Are Cataracts Treated When Both Eyes Are Affected?

Early cataracts may be managed with updated glasses, brighter lighting, and anti-glare lenses. When cataracts begin to interfere with daily activities - such as driving, reading, or working - cataract surgery may be recommended.

If surgery is needed in both eyes, procedures are usually scheduled weeks apart. This allows the first eye to heal properly before addressing the second eye and helps ensure the best visual outcome.

When Should You Be Evaluated?

If you notice persistent blurry vision, glare, frequent changes in your glasses prescription, or difficulty seeing clearly even with correction, it’s time for a comprehensive eye exam. Early detection allows your eye doctor to monitor changes and guide you on the right timing for treatment.

Don’t Let Cataracts Cloud Your Vision

Cataracts commonly affect both eyes, but they don’t always progress at the same pace. One eye may become symptomatic long before the other, which is completely normal. Regular eye exams are essential for tracking changes, protecting your vision, and determining when treatment is appropriate.

If you’re experiencing vision changes or have concerns about cataracts, schedule a comprehensive eye exam with Eye Focus Northwest. Visit our office in Salem or Tigard, Oregon. Call (971) 808-2640 or (971) 202-1932 book an appointment today.