Noticing My Vision Changing: The Slow Dimming I Blamed on Everything Else
By Pauline Driscoll | Medically reviewed by Mr Lewis Pereira, FRCOphth
Published March 27, 2026 · Last updatedMay 7, 2026 · Last reviewed May 11, 2026 · 3 min read
Key takeaways
- Cataracts dim sight so slowly that many people blame lighting, dirty glasses or tiredness rather than their own eyes.
- The first things to go are often reading in poor light and night driving, as glare and haloes bloom around headlights.
- Colours fade and yellow because the clouding lens scatters and absorbs light instead of letting it pass cleanly to the retina.
- Most people develop some lens clouding by their 70s, so these changes are common rather than alarming.
- An optometrist can confirm a cataract with a simple sight test, which is worth booking when small print or night driving gets harder.
My vision changed so slowly that I spent the better part of two years blaming dim bulbs, smeared spectacles and my own tiredness, when the real cause was a cataract quietly clouding each lens1. The first things to go were reading small print in poor light and driving after dark, and only later did I learn that this gradual dimming, glare and yellowing is the classic way a cataract announces itself2.
This is where my story starts, before I knew the word cataract applied to me. If you want the medicine behind these changes, read cataract surgery, and the diary continues with deciding to have cataract surgery and the moment of seeing clearly again after cataract surgery.
The dimming I blamed on the lighting
A cataract dims vision because the clouding lens scatters and absorbs light rather than letting it pass cleanly to the retina, so the world looks progressively blurred, dim and washed-out1. The cruel part is how slow it is.
I am retired, and I had quietly turned every light in the house up, one room at a time, over many months. I changed the bulb above the kitchen table twice, convinced it kept failing. I cleaned my glasses obsessively. It never once occurred to me that the fog was inside my own eyes, because nothing changed overnight; it just got a little softer, a little greyer, week by week.
Reading and night driving went first
For most people the first daily losses are reading in poor light and night driving, as glare and haloes bloom around lights and contrast falls away1. That was exactly my pattern.
Small print under the lamp started swimming, so I read by the window in daylight without admitting why. Then the evening drive home became a trial: oncoming headlights smeared into great starbursts, and the white lines were harder to pick out. I started declining lifts after dark and pretending I simply preferred to be home early. Looking back, I had reorganised half my life around an eye change I had not yet noticed.
Colours faded without me seeing it
As the lens clouds it also yellows and browns, so blues and whites dull and colours look faded2. This one I genuinely could not see happening, because both eyes dimmed together and there was nothing to compare against.
I only understood it afterwards, when the colours came back. Before surgery, I would have told you my eyesight was fine apart from a bit of blur. It was only later that I realised how sepia my whole world had become, like an old photograph I had stopped noticing was faded.
Why the slow change hid the cataract
These changes hide because cataracts are mostly age-related and very common, and most people develop some lens clouding by their 70s, so the gradual dimming feels like ordinary ageing2. Worldwide, cataracts remain the leading cause of reversible blindness, which is striking given how treatable they are3.
The brain is good at compensating, especially when one eye covers for the other. That is why so many people, like me, only discover a cataract when it is measured rather than when they first feel it.
When I finally booked the sight test
The sensible trigger to get checked is when small print, glare or night driving become harder, rather than waiting for a cataract to be ripe, which is an outdated idea4. I left it far too long.
What finally pushed me was struggling to read a menu in good daylight, in a well-lit room, with clean glasses and no excuse left. I booked a sight test almost out of irritation, expecting a new prescription. Instead the optometrist found a cataract in each eye. If your own lighting keeps mysteriously failing, do not do what I did and wait two years; book the test. The next step in my story is deciding to have cataract surgery.
References
- Cataract symptoms, American Academy of Ophthalmology. ↩
- Cataract surgery, NHS. ↩
- Blindness and vision impairment, World Health Organization. ↩
- Cataracts in adults: management (NG77), NICE. ↩
Common questions
What were the first signs my vision was changing?
For me the first things to go were reading small print in dim light and driving at night, when oncoming headlights bloomed into great smears. Common early signs of a cataract are gradually blurred or misty vision, more glare and haloes around lights, faded or yellowed colours and worse night vision. They creep on slowly, which is why so many people blame the lighting or their glasses first.
Why did I not notice my cataract sooner?
Cataracts cloud the lens so gradually that the brain adjusts as you go, turning lights up and avoiding night driving without quite deciding to. Because the change is so slow, many people do not realise how much sight they have lost until it is measured at a sight test. If one eye is worse than the other, the better eye compensates and hides the loss for longer.
Can a cataract make colours look different?
Yes. As the lens clouds it also yellows and browns, so blues and whites look duller and colours seem faded and less vivid. Many people only notice once the cataract is removed and the world looks startlingly bright and blue again, which is exactly what happened to me after surgery.
Are these vision changes a normal part of ageing?
Mostly, yes. Cataracts are mostly age-related and very common, and most people develop some degree of lens clouding by their 70s. Developing a cataract does not mean anything has gone wrong; it is one of the most ordinary changes the eye goes through with time. Worldwide, cataracts remain the leading cause of reversible blindness, but they are very treatable.
When should I book a sight test about it?
It is worth booking a sight test when small print, glare or night driving become harder, or when you find yourself turning lights up and avoiding driving at dusk. An optometrist can confirm a cataract with a simple examination. There is no need to wait until vision is badly affected, and no need to wait for a cataract to be ripe before anything can be done.
Does a cataract always need treating straight away?
No. A cataract is treated when it starts to affect daily life such as driving, reading, work or hobbies, rather than at a fixed level of cloudiness. In the early stages, updated glasses and brighter lighting may help for a while. The decision about whether and when to operate is shared between you and a surgeon.
Written by Pauline Driscoll. Medically reviewed by Mr Lewis Pereira, FRCOphth.
Our guides are written from personal experience and reviewed by a qualified clinician for accuracy. Read our editorial policy.
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