Skipping cataract surgery doesn’t put your eye in sudden danger, because an age-related cataract usually clouds slowly over years. But the cloudiness doesn’t clear on its own, so whatever vision it takes stays lost until the lens is replaced. The costs of waiting also reach beyond blurry sight, into how safely you drive and get around and how you feel day to day.1The Journals of Gerontology: Series A. The association of cataract surgery with risk of falls and fractures among Medicare enrollees with cataract
How Your Vision Changes as a Cataract Grows
The most common type, a nuclear cataract, forms in the center of the lens and slowly hardens and yellows it.2Visionary Eye Doctors. What Is The First Sign of Cataracts | Warning Signs of Cataracts That can shift your eyes toward nearsightedness, which makes distance vision worse.3Smart Vision Optometry. What Happens If I Don’t Get Cataract Surgery? Oddly, some people briefly find they can read without glasses.4Visionary Eye Doctors. What Is The First Sign of Cataracts | Warning Signs of Cataracts The improvement is temporary and not a sign the cataract is healing.5Visionary Eye Doctors. What Is The First Sign of Cataracts | Warning Signs of Cataracts Easier reading can tempt people to put off checkups while distance vision, the kind you need for driving, keeps getting worse.
Day to day, colors look faded or yellowish and whites look dingy. Headlights and sunlight cause starbursts and glare. You need brighter light to read, and your glasses prescription changes often. Faces and street signs blur at a distance before close work suffers.
Some types progress much faster than others. A posterior subcapsular cataract sits at the back of the lens, right in the path of light. When one grows noticeably over two years, the chance of needing surgery within five years is about 8 times higher than when it stays steady.6PubMed Central. Changes in Lens Opacities on the Age-Related Eye Disease Study Grading Scale Predict Progression to Cataract Surgery and Vision Loss The same growth roughly triples the chance of losing two or more lines on the eye chart.7PubMed Central. Changes in Lens Opacities on the Age-Related Eye Disease Study Grading Scale Predict Progression to Cataract Surgery and Vision Loss A growing cataract in the center of the lens nearly triples the chance of surgery and less than doubles the chance of that vision loss.8PubMed Central. Changes in Lens Opacities on the Age-Related Eye Disease Study Grading Scale Predict Progression to Cataract Surgery and Vision Loss
Age-related cataracts typically take many years, often a decade or more, to badly limit sight. Cataracts after an eye injury can worsen much faster. Left untreated long enough, a cataract can reduce sight to light perception, though surgery can usually still restore some sight.
Cataract blur usually doesn’t clear with blinking or with moisturizing drops, unlike dry-eye blur that comes and goes, though glare often makes it worse in bright light. Cataracts often progress unevenly, so one eye may look clearly worse when you cover the other. Because the change is so gradual, many people only notice how much they’ve lost after an eye test or after trying a clean pair of glasses. Other conditions, such as macular degeneration, can also dim vision, so new blur is worth an eye exam rather than a guess that it’s the cataract.
How Waiting Too Long Can Make Surgery Harder
Surgery on fully white, mature cataracts runs into complications more often than surgery on typical cataracts.9PubMed Central. Visual Outcome and Complications in White Mature Cataracts after Phacoemulsification In one group of such eyes, about 1 in 9 had problems while the surgeon opened the lens capsule.10PubMed Central. Visual Outcome and Complications in White Mature Cataracts after Phacoemulsification About 1 in 11 needed a switch to a larger-incision technique, sometimes because the lens center was rock hard.11PubMed Central. Visual Outcome and Complications in White Mature Cataracts after Phacoemulsification
The reason is the way modern surgery works. Ultrasound energy breaks the clouded lens into pieces so they can be removed through a tiny opening, and a very dense lens needs more of that energy. More energy means more stress on the cornea, the delicate clear layer at the front of the eye, which can leave it hazy or swollen for longer afterward. A softer, earlier cataract breaks up more easily. That’s why surgeons judge how hard the lens looks at the exam when planning your operation. An old belief held that cataracts had to “ripen” before removal, but modern surgery works best before the lens becomes very hard.
An advanced cataract can also swell and crowd the space at the front of the eye.12PubMed Central. The impact of cataract progression on accuracy of intraocular lens power measurement That can make it harder to measure the eye for the new lens accurately,13PubMed Central. The impact of cataract progression on accuracy of intraocular lens power measurement so the final focus may be less exact than with earlier surgery.
Even after a long delay, most people with advanced cataracts still gain useful vision from surgery. Expect your surgeon to discuss added risks and possibly a longer recovery.
Rare but Serious Eye Problems From Very Advanced Cataracts
A hypermature cataract is one so advanced that the lens starts breaking down.14PubMed Central. Lens-induced uveitis: an update Its altered proteins can leak through the lens’s outer layer into the front of the eye,15PubMed Central. Lens-induced uveitis: an update and the eye mounts an inflammatory reaction against them.16PubMed Central. Lens-induced uveitis: an update Debris can then clog the eye’s drainage channels and raise eye pressure to damaging levels, a form of glaucoma.17PubMed Central. Lens-induced uveitis: an update This is rare: lens-triggered inflammation accounts for under 1% of all eye inflammation cases.18PubMed Central. Lens-induced uveitis in a patient with hypermature cataract
Unlike the gradual dimming of an ordinary cataract, the inflamed eye usually becomes red and painful, and vision may drop suddenly. Raised pressure can add headache and make lights look like they have rings around them. Treatment typically involves calming inflammation and lowering pressure with drops or medicine, then removing the cataract, which is the source of the problem. Pressure damage to the optic nerve can be permanent, so the time between symptoms and treatment matters. Same-day care is needed for a painful, red eye in someone with a long-standing cataract, for a sudden worsening of already poor sight, or for headache, nausea or halos along with eye pain.
A dense cataract can also block your doctor’s view of the retina at the back of the eye.19MERSI. Cataracts vs Retinal Disease: What’s Causing Vision Changes? Problems like macular degeneration or diabetic eye disease may then go unnoticed until harm is permanent.20BVA Advanced Eye Care. What Happens If Cataracts Are Left Untreated? People with diabetes need retina checks even with a cataract. Ask whether your doctor can see your retina well enough, and whether a scan can look past the cloudiness when a direct view fails.
Driving and Falls With an Untreated Cataract
Older drivers with cataracts are about 2.5 times more likely to have caused a crash in the past five years.21PubMed. Older drivers and cataract: driving habits and crash risk About a quarter of people with cataracts keep driving even when their vision falls below licensing standards.22International Psychogeriatrics. Road safety in an aging population: risk factors, assessment, interventions, and future directions After cataract surgery, older drivers had about half the crash rate of those who skipped it.23PubMed. Impact of cataract surgery on motor vehicle crash involvement by older adults
The trouble shows up in specific situations. Glare from oncoming headlights, wet roads and low sun scatters inside a clouded lens, which can leave you briefly unable to see ahead. Reduced contrast makes gray objects, such as pedestrians in dark clothes, curbs and road edges, harder to pick out. Signs need to be read from farther away than people realize, so a blurry sign gives less time to react. These problems appear most at dusk, at night and in rain, even when daytime driving seems fine.
That’s also why a normal eye chart result may not settle whether you’re safe. The standard chart measures sharpness in high contrast and bright light, where a cataract often causes the least trouble. You can pass a licensing vision check and still struggle with night driving, so how you do in the conditions you actually drive in matters as much as the chart score. Signs your cataract is affecting your driving include avoiding night driving because of headlight glare, trouble reading road signs in time, and family members voicing worry or describing near-misses at intersections.
Falls are a concern too, though the evidence is mixed. Poor vision in older adults is linked with more falls and fractures.24The Journals of Gerontology: Series A. The association of cataract surgery with risk of falls and fractures among Medicare enrollees with cataract Among older adults with cataracts on Medicare who skipped surgery, about 9 in 100 fell or broke a bone within a year.25PubMed Central. The association of cataract surgery with risk of falls and fractures among Medicare enrollees with cataract Surgery did not clearly lower that one-year risk in the same group.26PubMed Central. The association of cataract surgery with risk of falls and fractures among Medicare enrollees with cataract
While you wait, limit driving to daylight and familiar routes. At home, brighten the lighting and stair edges, remove loose rugs, and use night lights.
Effects on Mood, Memory and Sleep
Cataract-related vision loss limits independence and daily activities, which can trigger anxiety or depression.27PubMed Central. The association between cataract surgery and mental health in older adults: a review Among older adults waiting for surgery, almost 3 in 10 had signs of depression.28PubMed. Depressive symptoms in older adults awaiting cataract surgery Those signs appeared even when vision was only moderately reduced.29PubMed. Depressive symptoms in older adults awaiting cataract surgery
Some people feel better emotionally once they can read, watch television and recognize faces again, which fits the idea that lost sight was feeding low mood. That doesn’t mean surgery treats clinical depression, so ongoing sadness, loss of interest or poor appetite is worth discussing with a doctor regardless of the eye.
People with cataracts have about a 22% higher risk of developing dementia.30PubMed Central. Blinded Minds: The Role of Cataracts in Cognitive Decline and Dementia In one large group, those who had surgery had about 29% lower dementia risk than those who didn’t.31Providence Digital Commons. Association Between Cataract Extraction and Development of Dementia Across many studies, surgery was linked to about 25% less long-term cognitive decline.32PubMed. Cataract Surgery and Cognitive Benefits in the Older Person: A Systematic Review and Meta-analysis These are links, not proof that surgery prevents dementia.
The studies can’t show cause. People with poor vision may differ in health, income or access to care, which also affect dementia risk. Early dementia can lead to missed eye care, so some of the link may run the other way. And people who choose surgery tend to be healthier and more active to begin with, which could make them look better afterward.
Light matters for sleep too. A cataract blocks more and more blue light as it yellows,33PubMed. The effect of cataract surgery on salivary melatonin and sleep quality in aging people so it may disturb your body clock and sleep quality.34PubMed. The effect of cataract surgery on salivary melatonin and sleep quality in aging people
Family members often notice the changes first: giving up reading, hobbies or outings, seeming confused in dim places, and sleeping poorly or dozing during the day.
Is There Any Treatment Besides Surgery
No eye drop, supplement, food or exercise has been proven to remove or reverse a cataract.35Aiello Eye Institute. Can You Reverse Cataracts Without Surgery? at Aiello Eye in Yuma Experimental drops such as lanosterol have not worked in human trials,36Berkeley Eye Center. Is It Possible To Get Rid Of Cataracts Without Surgery? and no non-surgical cure has regulatory approval.37Southwest Eye Institute. Can You Reverse Cataracts Without Surgery? What Really Works A cataract is a clouding of proteins that have changed shape inside the lens, and the lens has no way to clear them, so there’s nothing for a drop to wash away.
Be wary of drops sold online as cataract dissolvers. Some may irritate your eyes and delay needed care, so ask your eye doctor before trying any remedy.
Some things do help for a time. Updated glasses can sharpen vision early on, anti-glare coatings and sunglasses reduce glare, and magnifiers and brighter lamps help with reading. You can also protect your eyes from new damage by wearing UV-blocking sunglasses outdoors, not smoking, and controlling blood sugar if you have diabetes.
How to Decide When to Have Surgery
Surgery is usually advised when blurry vision interferes with daily tasks, not at a set stage. Having both eyes done on the same day gave results as good as separate days in one large review,38PubMed Central. Immediate Sequential versus Delayed Sequential Bilateral Cataract Surgery: Retrospective Comparison of Postoperative Visual Outcomes so people worried about repeated trips may have that option. Signs it’s time to schedule include failing the vision standard for your driver’s license, glasses no longer giving clear sight, big changes between checkups, and your doctor no longer being able to see your retina well.
Useful questions for your eye doctor: How fast is my cataract changing? Which type do I have? What are my risks if I wait a year? What recovery should I expect?
Recovery is usually straightforward. Surgery is typically outpatient and takes under an hour, vision often improves within days, and eye drops are used for several weeks.
To weigh your own trade-offs, think about what you most want to do, such as driving, reading, hobbies or seeing faces, and whether the cataract is getting in the way. Surgery has small risks, and waiting has costs of its own, so the right moment is when the daily losses outweigh those risks for you. Other health problems, such as another eye disease, may change the expected benefit, so ask what result is realistic in your eye.