Your eyes may be the windows to your soul but it turns out that they are also pretty accurate portals to our overall state of health. A surprising amount of ailments, from vitamin A deficiency to more serious mental health issues, diabetes and heart conditions, can be detected by a trained optometrist.
An odd twitch in the eye? Could be low blood sugar. Blurred vision and eye pain? You may be at risk of an aneurysm. Which makes a yearly appointment with your optometrist something of a priority (along with a GP check-up of course).