They're often described as the 'windows to the soul'. But a new study suggests that our eyes can convey more about us than we previously thought. Researchers from Leiden University have revealed ...

Dilated pupils are also caused by drug use, sexual attraction, brain injury, eye injury, certain medications, or benign episodic unilateral mydriasis (BEUM). The size of your pupils can say a lot ...

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

An optician referred her to the hospital, where an MRI scan revealed what was thought to be a schwannoma tumour on her third ocular nerveCredit: PA The pupil in her eye had expanded so much that ...