A five-year-old who lost an eye to a brain tumour is taking on a walking challenge to raise money for charity.

Riley Thompson, from Elderslie in Renfrewshire, was diagnosed with an optic nerve glioma—a rare, golf ball-sized brain tumour—after a routine preschool eye test and hospital scans in February.

The tumour, which was pressing against his eye, resulted in Riley losing an eye during life-saving surgery in May.

However, Riley is now tumour-free and is preparing to walk 99 miles in November to raise money for Brain Tumour Research alongside his parents Nicole and Sam.

Riley Thompson (far left), dad Sam (second left), mum Nicole (second right), sister Isla (far right) (Image: Brain Tumour Research) To support Riley’s challenge, go to his JustGiving page at https://tinyurl.com/ypbyfv2m.

Nicole said: "I noticed a regular squint which led to Riley’s eyes getting checked out by an optometrist at pre-school, then a series of doctors at the Royal Hospital for Children in Glasgow.

"My heart stopped when I saw a golf ball-sized lump just behind Riley’s eyeball – instantly I knew it must be a tumour.

"Thousands are diagnosed with brain tumours every year, and I urge all parents that if you notice anything unusual, get your child checked out.

"It could save their life."

Riley before diagnosis (Image: Brain Tumour Research) Despite several complications after surgery, including a spinal fluid leak from his removed eye socket, Riley has remained resilient.

He started primary school in September and continues to enjoy activities like playing with LEGO and practising taekwondo.

Nicole said: "Riley could have lost much more than an eye to this tumour like so many other children have, so it’s important we do our part to raise funds and awareness of the incredible work that Brain Tumour Research does.

"We’re committed to walking the 99 Miles in November challenge as a family—to help reach the ultimate goal of finding a live-saving cure for all brain tumours.”

Ashley Williams, community development manager at Brain Tumour Research, said: "Riley’s story is a heartbreaking reminder of the devastating impact brain tumours can have, not just on the individual but on their entire family.

"Despite the challenges, Riley’s bravery and his family’s resilience show the strength it takes to face this cruel disease.

"But the fact remains, stories like Riley’s are all too common. That’s why we desperately need more investment in researching brain tumours."