Friday essay: ‘an engineering and biological miracle’ – how I fell for the science, and the poetry, of the eye

By Hessom Razavi, The University of Western Australia

My first encounter came as a medical student. Under high magnification, I examined a colleague’s iris, the coloured part of their eye encircling the pupil.

I watched as the muscle fibres moved rhythmically, undulating between dilation and constriction. It looked like an underwater plant, swaying in a current.

Mesmerising. But in a busy university curriculum the experience quickly faded, to be replaced by the next clinical rotation. I forgot ophthalmology; “maybe orthopaedic surgery or emergency medicine are for me”, I thought.

But eyes returned, this time while I was a junior doctor in residency. Assisting in surgery, I observed a patient’s retina through an operating microscope. Here was a cinematic view of the orb, as if viewed from a spacecraft over a Martian landscape.

The internal surface glowed blood orange (the colour once ascribed to its rich blood supply, now attributed to a layer of underlying pigmented cells). Within this landscape ran red rivulets, a network of branching blood vessels.

The Greek anatomist Herophilus thought this pattern resembled a casting net, leading to “retiform” (meaning reticular or netlike), which became “retina” in contemporary language (the light-sensitive film at the back of the eye). I was struck by the intricacy of this secret globe, this gallery of miniature art.

The term “beauty is in the eye of the beholder” took on new connotations, and I turned to pursuing ophthalmology. Aside from the organ’s intrinsic appeal, I was struck by the technicality of eye surgery, and the apparent mystique of ophthalmologists themselves.

These unruffled surgeons appeared to float above the general fray, waltzing around the hospital with fancy eye equipment and clever jargon. No one really knew what they did, but they looked cool.

Acceptance into ophthalmology specialist training was notoriously competitive, with only one or two doctors accepted each year in our state.

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