According to health experts, the new generation of high-tech eye scans is capable enough to tell to you about potential health risks.
Tests offered to detect eye diseases such as glaucoma, cataracts and macular degeneration, and some other conditions such as diabetes can also provide an insight into the patients' health problems.
The eye has a huge potential as a means of diagnosing illness early where internal blood vessels and nerves can be viewed working undisturbed.
The tests offered by high street opticians and optometrists provide high-quality images, thus improving chances of detecting conditions such as high blood pressure, heart disease, multiple sclerosis, stroke, diabetes and brain tumors.
"Opticians have long been very good at assessing the front of the eye for problems like cataracts," Times Online quoted Andrew Coombes, a consultant eye surgeon at Barts and the London NHS Trust, as saying.
"But it's been more difficult with the equipment they've had to carefully examine the back of the eye, in particular, the whole retina and the point where the optic nerve joins it.
"The digital imaging techniques now available allow us to examine these vital structures at our leisure. A lot of opticians are embracing this and have exploited its commercial and diagnostic potential," he added.
The high-resolution images of the retina at the back of the eye can reveal breaks or abnormalities in blood vessels that might suggest blood pressure problems.
Inflammation of the optic nerve can sometimes indicate multiple sclerosis, while small blobs of cholesterol in the retina can indicate high stroke risk.
"People shouldn't be frightened into having these tests, but they can provide a lot of reassurance," he said.