The NHS has issued an important advisory for those who rely on contact lenses or glasses, highlighting a potential risk of an often-overlooked eye condition. This condition, known as astigmatism, is frequently associated with “blurry vision,” a symptom that many may not immediately recognize as significant.

Astigmatism typically calls for corrective measures such as glasses or contact lenses. However, the NHS cautions that there could be another underlying condition closely related to astigmatism which might necessitate the use of corrective lenses. Regular eye examinations are advised, as early detection can significantly improve management of the condition.

Astigmatism occurs when the eye has an irregular shape, resembling a rugby ball rather than a perfectly round football. This irregularity causes light to focus in multiple areas within the eye, leading to vision distortion.

**Key symptoms of astigmatism include:**

• blurred vision
• headaches
• eye strain – you may notice this after concentrating for a long time, such as when using a computer

What are the treatments for astigmatism?

While not all cases of astigmatism require intervention, health professionals suggest several treatment options, including eyewear and even laser surgery. Each treatment comes with its own set of advantages and disadvantages, and not every option is suitable for everyone.

Astigmatism often occurs together with short-sightedness or long-sightedness. If it affects only one eye, it can sometimes lead to a lazy eye, which occurs when vision doesn’t develop properly. The NHS noted that detecting it early is important so that treatment can be started as soon as possible.

When was your last eye test?

The NHS suggested that if you or your child have symptoms of astigmatism or you or your child have not had an eye test in 2 years, you should go to your optician. The NHS warns: “Astigmatism can be linked to an eye condition called keratoconus. So it’s important to get regular eye tests.”

What is keratoconus?

Specsavers UK explained: “Keratoconus happens when the cornea (the round, clear front part of the eye) starts to weaken and thin at its centre, causing it to become irregular (or coned) in shape. Eventually, this prevents the eye from focusing properly, which causes poor vision.”

Keratoconus often affects both eyes, and the symptoms can differ from person to person. In its early stages, keratoconus symptoms can include:

• Mild blurring or vision

• Slightly distorted vision, with some parts clear and some parts blurry

• Increased sensitivity to light and glare

In a small number of cases, keratoconus continues to progress. Symptoms include:

• Very blurry and distorted vision

• Eye pain

• Increased near‑sightedness or astigmatism

• Not being able to wear contact lenses, as they no longer fit properly

In the early stages, your optometrist can recommend glasses or contact lenses as a treatment option. If the condition progresses, you may need to be referred to a corneal specialist to explore further treatment options based on the severity of your keratoconus.

Free NHS eye tests – are you eligible?

You’re entitled to a free NHS sight test if you:

• are under 16
• are 16, 17 or 18 and in full-time education (this includes being taught full-time at a school, college, university or at home)
• are 60 or over
• are registered as partially sighted or blind
• have been diagnosed with diabetes or glaucoma
• are 40 or over and your mother, father, sibling or child has been diagnosed with glaucoma
• have been advised by an eye doctor (ophthalmologist) that you’re at risk of glaucoma
• are a prisoner on leave from prison
• are eligible for an NHS complex lens voucher – your optician can advise you about your entitlement
• are entitled to or named on a valid NHS certificate for full help with health costs (HC2)

You’re also entitled if you or your partner – including civil partner – receive, or you’re under the age of 20 and the dependant of someone receiving:

• Income Support
• Income-based Employment and Support Allowance
• Income-based Jobseeker’s Allowance
• Pension Credit Guarantee Credit
• Universal Credit and meet the criteria

People named on an NHS certificate for partial help with health costs (HC3) may also get help with the cost of a private sight test.

You can find out more about whether you are entitled to a free NHS eye tests and optical vouchers here.