Eye conditions

If you experience blurred or distorted vision and headaches then you could have astigmatism, which means light doesn't focus properly on the retina.

When distant objects appear blurred, but your near vision is perfectly clear then you may have a refractive error called myopia.

If you struggle to see objects that are close-up, but are able to see objects clearly at a far distance, then you may be hyperopic.

Are you having trouble focusing on nearby objects? You may be suffering from presbyopia. This is normally a problem that affects people over the age of 40.

A cataract is a cloudy area that develops on the lens of the eye, leading to blurred, cloudy and misty vision. It is common in older people, and can be helped by prescription glasses, brighter reading lights or surgery.

Specialized lenses can help sensitivity to light, which may stem from one of several underlying conditions and can cause headaches and discomfort.

Computer vision syndrome is an umbrella term for eye and vision problems that are caused by looking at digital screens for long periods of time.

A squint is when a person's eyes focus in different directions. This can lead to blurred and double vision and lazy eye.

Lazy eye most commonly occurs in young eyes and should be easy to treat. If left uncorrected, however, it could permanently affect the vision.

Colour-blindness varies in severity. Sufferers can find it difficult - or even impossible - to see certain colours.