A couple writing exercises about eyes
1) Eyes are always described when it comes to people, so you need to come up with a unique description of this eye using a description from childhood, involving playing/coloring/painting etc. Base your poem around that description. Come up with a short narrative to get to that dish. Write the poem in the first person.
2) Write a poem using the science of eyes. About Optical Nerves, perhaps ophthalmologists.