lens placode


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lens placode

A placode developing in the ectoderm directly overlying the optic vesicle. It forms the lens vesicle, which becomes enclosed in the optic cup and eventually becomes the lens of the eye.
See also: placode
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In our patient, the probable explanation for the embryogenesis of the supernumerary nostril, accessory nasal cavity, and congenital cataract involves a defect in the migration of cells from the frontal prominence, which led to a simultaneous anomaly in the development of the nasal and lens placodes. In this case, the additional olfactory pit that formed was clearly smaller than the normal olfactory pits.