A cataract is a clouding of the eye's natural lens, and for most people it develops gradually over several years. Because the change happens slowly, many patients adjust without realising anything is wrong — until a routine eye test reveals how much vision has actually been lost. Recognising the early signs means you can get diagnosed sooner, while treatment options are still simple and non-urgent.
1. Colours look duller than they used to
A clouded lens filters light differently, so whites can take on a yellowish tinge and colours in general lose some of their vibrancy. This is often first noticed when comparing an old photo to how a scene looks in person, or when a partner or family member points out that something looks "washed out" to them but not to you.
2. Night driving feels harder than it should
Glare and halos around headlights and streetlights are one of the most common early complaints. Oncoming headlights may scatter into a starburst pattern, and it can take longer for your eyes to adjust between light and dark environments — both signs that light is being scattered unevenly as it passes through the lens.
3. You're changing your glasses prescription often
A cataract can gradually shift how light focuses on the retina, which sometimes shows up as a string of prescription changes in a short period, or a temporary improvement in reading vision that patients describe as "second sight." This isn't a sign your eyes are getting better — it's usually the lens itself changing shape as the cataract progresses.
4. Reading and close-up tasks need more light
Needing brighter light to read comfortably, or finding fine print harder to make out even with the right glasses, is a common early symptom. It happens gradually enough that people often adapt by switching to bigger fonts or better desk lamps rather than getting the underlying cause checked.
5. Double vision in just one eye
Occasional double or ghosted vision that persists even when covering the other eye — rather than the more common two-eye double vision — can point specifically to changes within the lens itself, and is worth mentioning to your ophthalmologist even if it seems minor.
Cataracts are one of the most treatable causes of vision loss. The earlier they're diagnosed, the more options a patient has — including simply monitoring the cataract until surgery is genuinely needed.
What happens at a check-up
A cataract evaluation typically includes a slit-lamp examination to view the lens directly, along with tests for visual acuity and glare sensitivity. If a cataract is confirmed, most patients don't need immediate surgery — many are simply monitored until the cataract starts affecting daily activities like driving or reading, at which point micro-incision surgery with a replacement lens is a routine, same-day procedure.
If any of these signs sound familiar, an eye examination can confirm what's going on and rule out other causes with similar symptoms, such as early glaucoma or refractive changes.