Dilating drops open your pupils so the doctor can check your ... Female Narrator Because so many diseases can first be seen inside the eye, you have a greater opportunity for early diagnosis ...

A new study identified 29 blood vessel 'fingerprints' in the retina – the light-sensitive layer of tissue in the back of our eyes – that are significantly associated with increased risk of stroke.

They’re caused by tiny particles or fibers floating in the vitreous humor—the gel-like substance inside your eye. These shapes cast shadows on the retina, creating the illusion of movement.