Cataracts and the evolution of vision care

Large studies show that individuals who undergo cataract surgery have a lower risk of developing dementia compared with those whose cataracts remain untreated.

A common condition that develops quietly

One of the most memorable moments in my career came after cataract surgery, when a grandparent told me they were seeing their grandchild’s freckles clearly for the first time. The freckles were not new. The clarity was.

Vision shapes how we experience the world, and cataracts sit at the center of how vision changes with age.

Cataracts occur when the natural lens inside the eye becomes cloudy. This lens is normally clear and flexible, allowing light to focus sharply on the retina. Over time, proteins within the lens clump together, scattering light and reducing visual clarity. Many people first notice difficulty reading, increased glare while driving at night, or trouble tracking a golf ball, sometimes blaming declining golf scores on everything except their vision.

From crude beginnings to modern surgery

The evolution of cataract surgery is far more dramatic than most people realize. For centuries, the only treatment was a crude technique known as couching, in which the cloudy lens was pushed out of the line of sight with a sharp instrument. While this occasionally improved vision, it often left patients with severe limitations and risk.

A true turning point came in the mid 20th century, when Sir Harold Ridley observed that fragments of aircraft canopy material embedded in the eyes of injured pilots during World War II caused surprisingly little inflammation. That insight led him to perform the first artificial lens implant, transforming cataract surgery from simply removing a cloudy lens to restoring vision.

The modern era followed soon after, when Dr. Charles Kelman introduced phacoemulsification. Inspired by dental ultrasound technology, Kelman realized that sound energy could be used to break up a cataract inside the eye and allow it to be removed through a much smaller incision. This insight fundamentally changed cataract surgery and made minimally invasive treatment possible.

Cataract surgery today

Modern cataract surgery still relies on this same ultrasound principle, now refined through decades of innovation. Ultrasound energy is used to break the cloudy lens into small fragments, which are removed through a small, self-sealing, stitchless incision. For patients, this often means faster recovery and a smoother return to daily life.

Because of these advances, cataract surgery is often pursued earlier than in the past. Instead of waiting for severe vision loss, surgery can be timed when vision changes begin to interfere with even routine daily activities and quality of life.

Advanced technology lenses and personal vision goals

Once the cataract is removed, a clear artificial lens is placed inside the eye to permanently replace the natural lens. While traditional lenses provide clear vision at a single distance, advanced technology lenses represent a revolutionary shift in cataract surgery, allowing vision to be corrected at distance, intermediate and near ranges rather than limited to just distance vision.

Cataract surgery is now highly customizable. For many people who have relied on glasses for decades, this can mean reducing or, in some cases, eliminating dependence on them for much of the day.

Vision and brain health

Research has highlighted a growing connection between vision and brain health. Large studies show that individuals who undergo cataract surgery have a lower risk of developing dementia compared with those whose cataracts remain untreated. While surgery does not prevent dementia, restoring vision may help preserve mobility, independence and social engagement as people age.

Other common causes of vision loss after 65

Cataracts are often the reason people return to an eye doctor later in life, but other serious conditions may be developing at the same time. Glaucoma and macular degeneration are two leading causes of permanent vision loss after 65, and both can progress without early symptoms. Glaucoma quietly damages peripheral vision, while macular degeneration affects central vision needed for reading, recognizing faces and driving.

Dry eye and everyday comfort

Dry eye disease is extremely common, particularly during colder months, and can significantly affect comfort and visual quality even when vision is otherwise healthy. Many patients find relief with a combination of over-the-counter options and prescription therapies, and for those who cannot tolerate eye drops, there are also safe in-office procedures that can improve symptoms and quality of life.

Looking ahead

Cataract care has changed not only in how surgery is performed, but in what it offers patients. What was once something people endured late in life has become an opportunity to restore clarity and tailor vision to how people actually live. As advances in cataract surgery continue to improve how we restore vision, I encourage prioritizing annual comprehensive eye examinations as an equally essential part of protecting long-term eye health. Recognizing vision changes early helps people remain active, independent and able to clearly see the details that matter most. PJC

Joshua Paul, MD, is a physician and president of The Cataract and Vision Center of Pittsburgh. cvcofpgh.com, 412-963-0414, 1326 Freeport Road, Pittsburgh, PA 15238