Inside your eye is a clear lens that focuses light, a little like the lens of a camera. As we get older, this lens can slowly turn cloudy. That cloudiness is called a cataract — and it is one of the most common reasons older people lose clear vision.
The good news is simple: cataract is also one of the most treatable causes of poor sight in the world. Worldwide, it is the leading cause of blindness that can be put right with a short operation.
Signs to look out for
A cataract usually develops slowly, over months or years. You or an older family member might notice:
- Blurred or foggy vision, as if looking through a misty window
- Glare or halos around lights — sunlight, or headlights at night
- Poor night vision, or needing much brighter light to read
- Colours looking faded or yellowish
- Needing to change spectacles often, with little improvement
These changes can creep up so gradually that people put them down to “old age” and simply stop doing the things they enjoy. They don’t have to.
Why you don’t need to wait
Many families believe a cataract must “ripen” before anything can be done. With modern surgery, that is no longer true — there is no need to wait until you can barely see. When the cloudiness starts to get in the way of everyday life — reading, cooking, recognising faces, going out after dark — it can be treated.
Cataract is not usually an emergency, and it is not a growth or a film that drops or medicine can clear. The only way to remove it is a small operation that gently takes out the cloudy lens and replaces it with a clear artificial one. It is most often done as stitchless, day-care surgery under eye-drop anaesthetic.
What to do next
If your vision — or an elderly parent’s vision — has slowly become cloudy, the simplest step is an eye check. A doctor can tell you whether a cataract is the cause, and explain your options in plain words. Clear sight can often make an enormous difference to confidence, safety and independence.