June is Cataract Awareness Month, and the standard advice you will find almost everywhere goes like this: cataracts cloud the lens of your eye, surgery fixes them, the end. That version is technically accurate. It is also wildly incomplete.
Cataracts are the leading cause of reversible blindness worldwide. In the United States alone, more than 24 million people over age 40 have them. By age 80, more than half of all Americans either have a cataract or have already had cataract surgery. Yet most people have a surprisingly fuzzy understanding of what cataracts are, how they actually change the way you experience the world, and most importantly, when it is time to do something about them.
This month, we want to go deeper than the basics.
Your Lens Is Living Tissue, Not a Window
Most people picture the eye like a camera. Light comes in through the cornea, passes through the lens, and lands on the retina in the back. Simple enough. What that analogy misses is that your lens is not glass. It is living tissue, made up of water and a protein called crystallin.
When you are young, those proteins are arranged in precise, transparent layers. Over time, they begin to break down and clump together. Those clumps scatter light instead of focusing it cleanly on your retina. The result is the haze, the glare, the washed-out colors, and the general sense that the world has been turned down a notch.
Think of it less like a smudge on a window and more like a dimmer switch that someone is slowly, imperceptibly turning down. You rarely notice it happening in real time. You just gradually find yourself needing more light to read, sitting closer to the television, or wondering why evenings feel harder to navigate than they used to.
Not All Cataracts Are the Same
This is something most cataract articles skip entirely. There are actually several distinct types of cataracts, and they cause different visual disturbances depending on where in the lens the protein breakdown begins.
- Nuclear cataracts form at the center (nucleus) of the lens. These are the most common age-related type. They tend to cause increasing nearsightedness at first, which some people actually notice as a temporary improvement in their close-up reading vision. That short-lived improvement is sometimes called “second sight,” and it is a sign the cataract is progressing.
- Cortical cataracts develop in the outer edges of the lens and work inward in spoke-like patterns. These create significant problems with glare and contrast, especially when driving at night.
- Posterior subcapsular cataracts form on the back surface of the lens and tend to progress more quickly than the other types. They interfere with reading vision and can make bright light and headlights especially uncomfortable. They are also more common in people who use steroid medications long-term.
Knowing which type you have matters, because the pattern of your symptoms, the pace of change, and the timing of intervention can all differ depending on the type. Your eye doctor can identify this during a comprehensive dilated exam.
The Symptoms That People Dismiss (But Should Not)
Because cataracts develop slowly, the brain is remarkably good at compensating for the gradual changes. People often do not realize how much their vision has declined until after surgery, when they are genuinely shocked by how different the world looks. Some common early and mid-stage symptoms that often get explained away include:
- Colors look faded, yellowed, or less vivid than they used to
- Halos or starbursts appear around lights at night, especially headlights and streetlamps
- Bright sunlight or indoor lighting feels overwhelming or uncomfortable
- Prescription glasses that seemed fine six months ago no longer feel right
- Reading requires noticeably more light than it used to
- A general sense that contrast has dropped, making faces, stairs, or curbs harder to distinguish
Many people chalk these up to aging and stop driving at night, stop reading as much, or simply adjust their lives around declining vision. That adaptation is understandable, but it does not have to be permanent.
The Risk Factors Beyond Age
Age is the biggest driver of cataracts, but it is not the only one. Several factors can accelerate protein breakdown in the lens and cause cataracts to develop earlier or more aggressively:
- UV exposure. Cumulative sun exposure over a lifetime significantly increases cataract risk. This is a compelling reason to wear UV-blocking sunglasses, not just on beach days but year-round.
- High blood sugar can cause the lens to swell and accelerates protein changes. People with diabetes are more likely to develop cataracts at a younger age.
- Corticosteroid use. Long-term use of steroid medications, whether for asthma, arthritis, or other conditions, is associated with posterior subcapsular cataracts specifically.
- Smoking introduces oxidative stress that degrades lens proteins. It roughly doubles the risk of nuclear cataracts.
- Eye injuries and prior eye surgery. Trauma to the eye can damage the lens directly, and certain eye procedures can increase cataract risk over time.
So When Is It Time for Surgery?
This is the question we hear most often, and the honest answer is that there is no universal threshold. The decision is personal. Cataract surgery is recommended when the vision impairment begins to interfere with daily life in a meaningful way. That might mean:
- You have stopped driving at night because it feels unsafe
- Reading has become frustrating or fatiguing even with updated glasses
- Your prescription has changed significantly in a short period of time
- Activities you enjoy, whether needlework, cooking, golf, or anything that requires clear vision, have become more difficult
Cataract surgery is one of the safest and most commonly performed surgeries in medicine. The clouded natural lens is removed and replaced with a clear artificial lens called an intraocular lens (IOL). Most people notice dramatically improved vision within days. Some patients are even able to reduce or eliminate their dependence on glasses entirely, depending on the type of lens selected.
There is no prize for waiting. Cataracts do not improve on their own, and very dense cataracts can actually make surgery more technically complex. Catching them at a moderate stage gives you and your surgeon the most options.
What You Can Do Right Now
You cannot stop the natural aging of your lens, but you can slow the process and stay ahead of it.
- Wear UV-blocking sunglasses consistently. This is one of the most actionable things you can do. Look for lenses that block 100 percent of UVA and UVB rays.
- Eat for your lens. Foods rich in antioxidants, including leafy greens, colorful vegetables, eggs, and fish, support the health of the lens over time. Lutein and zeaxanthin in particular have been studied for their protective role.
- Manage systemic health conditions. Keeping blood sugar well controlled, staying on top of cardiovascular health, and working with your doctor to minimize steroid use when possible all contribute to slower lens aging.
- Schedule a comprehensive eye exam. A dilated exam allows your eye doctor to directly examine your lens and identify early changes before your vision is significantly affected. If you are over 60 or have any of the risk factors mentioned above, yearly exams are especially important.
A June Reminder Worth Taking Seriously
Cataracts are not a dramatic event. They do not announce themselves with sudden pain or a frightening symptom. They just quietly, gradually take the brightness out of your world. The good news is that they are among the most treatable causes of vision loss we have.
If it has been more than a year since your last comprehensive eye exam, if you have noticed any of the symptoms described here, or if you have been told in the past that cataracts are forming, this is a good month to make that appointment.
The dimmer switch does not have to keep turning. Come see us at Pearle Vision, and let us take a clear look at what is going on.