These health problems can be predicted with a look into your eyes

By Susan Scutti, CNN

Updated 1636 GMT (0036 HKT) March 1, 2018

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This illustration highlights the cornea, pupil and lens of a normal eye and how an image focuses on the retina.
Photos: A carousel of common eye conditions
This illustration highlights the cornea, pupil and lens of a normal eye and how an image focuses on the retina.
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This photograph of a normal retina reveals the vascular, or circulatory, system structures.
Photos: A carousel of common eye conditions
This photograph of a normal retina reveals the vascular, or circulatory, system structures.
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In background retinopathy, or damge to the retina, a slight deterioration in the small blood vessels occurs. Portions of the vessels may swell and leak fluid into the surrounding retinal tissue.
Photos: A carousel of common eye conditions
In background retinopathy, or damge to the retina, a slight deterioration in the small blood vessels occurs. Portions of the vessels may swell and leak fluid into the surrounding retinal tissue.
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Cytomegalovirus (CMV) retinitis is caused by the herpes viruses that infects most adults. It is a serious eye infection, with symptoms that usually occur in people with weakened immune systems. Untreated, it can lead to vision problems.
Photos: A carousel of common eye conditions
Cytomegalovirus (CMV) retinitis is caused by the herpes viruses that infects most adults. It is a serious eye infection, with symptoms that usually occur in people with weakened immune systems. Untreated, it can lead to vision problems.
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This photograph shows <a href="https://nei.nih.gov/health/maculardegen/armd_facts" target="_blank">age-related macular degeneration</a>, the leading cause of vision loss among people 50 and older, with fibrosis. It causes damage to the macula, a small spot near the center of the retina. The macula is the part of the eye needed for sharp, central vision.