Why Is My Vision Blurry? Common Causes Explained
Blurry vision is something almost everyone experiences at some point. It might happen when you wake up, after long hours on a screen, or it may happen suddenly for no apparent reason.
Objects may look out of focus, hazy, or less clear than normal. It can affect one eye or both, and it may come on suddenly or gradually. While it’s often harmless, it can sometimes signal a more serious eye condition.
Common causes of blurred vision
Here are some of the most common reasons:
Refractive errors (glasses needed)
Short-sightedness, long-sightedness, or astigmatism can all cause blurry vision.
Dry eyes
Very common, especially in Singapore and especially with screen use. Vision may fluctuate and improve with blinking.
Cataracts
Gradual clouding of the lens, often causing glare, dull vision, loss of sharpness and colour.
Eye strain
Long periods of reading or screen time can temporarily blur vision.
Floaters or vitreous changes
May be harmless, but sometimes linked to serious retinal issues.
Macular degeneration
Affects central vision, especially in older adults or in people with high degrees of myopia.
Diabetic eye disease
Can cause fluctuating or progressive blurring.
When should you worry?
Seek urgent eye care if you notice:
Sudden, severe blurring
Loss of vision in one eye
Flashes of light or a shower of floaters
A dark curtain or shadow in your vision
Eye pain with blurred vision
These could indicate serious conditions like retinal detachment or acute glaucoma.
How is blurry vision treated?
Treatment depends on the cause:
Glasses or contact lenses for refractive errors
Lubricating drops, lifestyle modifications, nutritional supplements and other therapies for dry eyes
Surgery for cataracts
Injections, laser or surgery for retinal conditions
The key is identifying the underlying problem early.
When should you see an eye doctor?
You should get your eyes checked if:
Blurry vision persists for more than a couple of days
It’s getting worse over time
It’s affecting your daily activities
You have underlying conditions like diabetes
And you should be checked urgently if you have sudden, severe blurring, loss of vision in one eye, flashes of light or floaters with blurred vision, a dark shadow or curtain in your vision, and if you have pain along with the blurred vision
Quick summary
Blurry vision is common and often harmless
Needing glasses for long- or short-sightedness, or dry eyes are frequent causes
Sudden changes in your vision should never be ignored
Early diagnosis helps prevent permanent vision loss
