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- How the Eyes Work (National Eye Institute)All the different part of your eyes work together to help you see. Learn the jobs of the cornea, pupil, lens, retina, and optic nerve and how they work ...
- What Does Melanoma Look Like? (National Cancer Institute)Melanoma/Images ... Melanoma ... National Cancer Institute ... From the National Institutes of Health ... Several photographs of melanoma, the deadliest form of skin cancer.