Thousands of British children could struggle in the classroom this year due to undiagnosed poor eyesight, according to new research.

As millions prepare for the start of term, figures reveal that 23% of parents with kids aged four to ten have never taken their little one for an eye test.

Shockingly, 36% had no idea children should have their first test around the age they start school.

Another 17% admit they wouldn't spot signs of vision problems, and 22% aren't even sure whether their child needs a test at all, according to the research carried out by Asda.

In some regions, schools don't routinely check children's eyesight at all, according to the British and Irish Orthoptic Society (BIOS), leaving it to parents to book tests independently.

Max Halford, Clinical and Policy Director at Association of British Dispensing Opticians, said: "Good vision is the foundation of learning and confidence. Children's eyesight isn't always checked at school, and screenings aren't the same as a full eye test. Starting school with undiagnosed vision problems can affect reading, writing, and attention, so a simple eye test before term starts can make a real difference. If your child does need glasses a dispensing optician is trained to advise on the best frame and lenses for their prescription requirements and to take accurate measurements to ensure your child has the best vision possible."

Despite this, 69% of parents admit eye tests don't make the back-to-school checklist.

Top excuses include jam-packed schedules (37%), tricky appointment times (30%), not knowing if a test is needed (22%), and even cost worries (16%) - despite eye tests being free for under-16s.

To give parents a nudge, Asda are there to remind families to book a check-up for their children while doing the weekly shop.

The supermarket offers free eye tests for under-16s through its in-store opticians.

Kids' frames include characters such as Barbie, Superman and Harry Potter, with prescription sunglasses from £16. Lenses come with extras like scratch-resistant and anti-reflective coatings at no added cost. Appointments are available outside of school hours and children under 16 must be accompanied by a parent or guardian.

Stuart Laird, Superintendent Optometrist and Head of Optical at Asda Opticians, adds: "We know the back-to-school period is a busy one and so we wanted to find a way to make it easy and fun to remind everyone of the importance of children's eye health and vision. Our optometrists, dispensing opticians and store colleagues are here to support patients and their families, making the whole process simple, quick, and stress-free, helping ensure every child has clear, healthy eyesight for the classroom, all while doing the weekly shop."