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The iris is the only internally visible organ of the human body. It is located in the eye behind the cornea and aqueous humour, and it is an ideal trait for measurement. It is protected by the eyelid and cornea, and is not exposed to harsh conditions that may cause it to be difficult to image. The iris, like the fingerprint , forms during the early stages of fetal development and is completed by the eighth month. It is extremely distinctive and will not be the same even for genetically identical twins. |
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