A cataract is often thought of as a condition that only appears in old age, yet it can also be found in people in their mid-forties or even earlier. It develops when the clear lens inside the eye, which focuses incoming light, gradually becomes cloudy, making vision look as if it is veiled in fog. How quickly it progresses, and when it first begins, varies a great deal from person to person.
People undergoing cancer treatment sometimes discover a cataract earlier than average. Certain chemotherapy drugs, radiation therapy to areas that include the head or near the eyes, and the relatively long-term use of steroids for managing side effects or immune-related care are all known to be able to accelerate changes in the lens. When common risk factors such as diabetes, smoking, or ultraviolet exposure are added, those changes may come on faster.
Symptoms tend to appear gradually. Vision may seem generally hazy, oncoming lights at night may look smeared or haloed, and colors may appear faded and dull. If updating your glasses prescription no longer sharpens things, it may be worth seeing an eye doctor.
Fortunately, finding a cataract does not mean surgery is needed right away. When the clouding is mild and daily life is not greatly affected, doctors often simply monitor it over time. Surgery is usually considered once the blurring clearly interferes with driving, work, or reading; cataract surgery is a fairly common procedure with a relatively quick recovery.
In daily life, it helps to protect your eyes with a brimmed hat or UV-blocking sunglasses, to keep blood sugar well managed if you have diabetes, and to keep regular eye check-ups. If you are on a long-term medication such as a steroid, do not stop it on your own; instead, talk through your eye health together with your care team.
This article is for general information only and does not replace individual medical care. Please discuss any changes in your vision or decisions related to treatment with your care team and an eye specialist.