A cataract is a clouding of the eye's natural lens that develops slowly with age. Because it comes on so gradually, many people adjust to the changes without realising what is happening. Recognising the early signs of cataract means you can plan treatment at the right time rather than waiting until vision is badly affected.
What is a cataract?
Inside your eye is a clear lens that focuses light onto the retina. Over time, proteins in this lens clump together and make it cloudy — like looking through a foggy or frosted window. This cloudiness is a cataract. It is a normal part of ageing, though it can also occur after injury, with diabetes, with long-term steroid use, or rarely from birth.
10 early signs you should never ignore
- Blurred or hazy vision — the most common early sign, as if a film is covering your sight.
- Difficulty driving at night — oncoming headlights become uncomfortable and vision feels dim.
- Glare and sensitivity to light — bright lights and sunshine cause discomfort or starbursts.
- Frequent changes in spectacle power — your glasses prescription keeps changing within short periods.
- Fading or yellowing of colours — whites look dull and colours seem less vivid.
- Double vision in one eye — seeing a ghost image even with the other eye closed.
- Needing brighter light to read — small print becomes hard without strong lighting.
- Halos around lights — rings appearing around lamps and headlights at night.
- Poor contrast — difficulty telling similar shades apart, especially in dim conditions.
- A temporary "improvement" in near vision — some people can suddenly read without glasses (called second sight) before vision worsens again.
If you notice several of these, it is worth getting your eyes checked.
How is a cataract diagnosed?
A cataract is easily confirmed during a routine eye examination, which may include:
- A vision test to measure how much your sight is affected
- A slit-lamp examination to view the lens closely
- A dilated retina check to rule out other causes of blurring
- Measurements for surgery planning if treatment is needed
Can medicines cure a cataract?
This is one of the most common questions — and the answer is clear: no medicine or eye drop can cure a cataract. Despite many advertised "cataract drops," none can reverse the clouding. The only proven treatment is surgery.
When is surgery needed?
Surgery is recommended when the cataract begins to interfere with your daily life — reading, driving, working, cooking or watching television. You do not need to wait for the cataract to become "fully ripe." In fact, very advanced cataracts can make surgery more complex, so timely treatment is usually better.
During surgery, the cloudy lens is removed and replaced with a clear artificial lens (an intraocular lens or IOL). It is typically a short, stitch-free, day-care procedure.
Recovery after surgery
Most people experience:
- Clearer vision within a day or two
- A quick return to routine activities
- A short course of eye drops to support healing
- Full settling of vision over a few weeks
Frequently asked questions
Can cataract be cured without surgery? No — surgery is the only effective treatment.
Should I wait until it ripens? No, treatment is best done when vision starts affecting daily life.
Is the surgery painful? It is done under anaesthetic drops and is generally painless.
The bottom line
Cataracts are extremely common and very treatable. The key is to notice the early signs and get your eyes examined, so you and your surgeon can decide the right time to act. Clear vision can almost always be restored.
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