{"id":5390,"date":"2010-10-14T07:11:35","date_gmt":"2010-10-14T12:11:35","guid":{"rendered":"http:\/\/www.ocularfusion.net\/?p=5390"},"modified":"2022-01-02T07:35:31","modified_gmt":"2022-01-02T12:35:31","slug":"entoptic-phenomena","status":"publish","type":"post","link":"https:\/\/www.ocularfusion.net\/?p=5390","title":{"rendered":"Entoptic Phenomena"},"content":{"rendered":"

\"\"<\/a>entoptic phenomena<\/em>: Events taking place totally within the eye<\/p><\/blockquote>\n

The way my patients squint and squirm in the chair, you\u2019d think I was coming at them with a dentist\u2019s drill. Or worse yet, a serpentine colonoscope, which, aside from a sword, is perhaps the coldest and most impersonal use of steel man has ever devised.<\/p>\n

But I\u2019m not that kind of doctor. I\u2019m an optometrist, and the only instruments of torture I\u2019m wielding\u2014at the moment, anyway\u2014are a large, table-mounted flashlight which, when turned all the way to \u201c11,\u201d rivals the glory of the sun, and a tiny, hand-held Coke-bottle thick magnifying glass, the kind you used to fry ants when you were a kid.<\/p>\n

I place the lens a scant few millimeters in front of my patient\u2019s eye and then grab the joystick, slowly moving my light source to bring the image into focus. It approaches, like the headlight of a train in a dark tunnel.\u00a0 That\u2019s the moment when the FAQS of an eye exam usually start.<\/p>\n

He is leaning over the edge of the exam chair, his chin resting in a hard, off-white, concave plastic cup and his forehead against a more flexible strip that resembles the headband that Olivia Newton-John wore when she was getting \u201cPhysical\u201d back in 1981. That people willingly place themselves in a device that looks like a trap from Saw IV<\/em> never ceases to amaze me. \u00a0He is in there but good, and there is little vertical leeway for the sort of locomotion necessary for intelligible speech. The sound of his voice is muffled and distorted slightly, but not as badly as it might be at the dentist\u2019s office after a shot of novocaine\u2014more 60 Minutes<\/em> \u201cwhistle-blower\u201d than Charlie Brown teacher voice.<\/p>\n

\u201cDamn doc, that light is like looking into the sun! Can this make me go blind?\u201d<\/p>\n

The image is bobbing up and down now in synch with his jaw, and I hold the lens with the tips of my fingers, adjusting it with subtle micro-motions in an attempt to corral the stray, Mars-red orb of light back within the boundary of my scope and into sharper focus. \u00a0I resist the urge to tell him to shut up. This is the South, and I don\u2019t want to appear rude to him\u2014bless his heart.<\/p>\n

Try to keep your teeth together as I look into the back of your eye, okay?\u00a0 Yes, I know we tell you not to look into the sun, and look at us now. Such rank hypocrisy! But no, you would never sit still long enough for that to happen. Besides I try my best not to blind my patients and always let off the gas at the faintest whiff of charbroiled cornea.<\/p>\n

\u201cWell, do I have a brain, doc?\u201d he asks, chuckling and thinking himself quite clever.<\/p>\n

He\u2019s actually cleverer than he thinks since the retina, the diaphanous, film-like tissue that lines the back of the eye, is<\/em> part of the brain. It is a jumping-on point, an outlying suburban platform serving a long, twisting train that winds its way through busy intersections of white and gray matter, crackling with the electricity of life, and terminates some distance away in the occipital lobe, a mysterious Grand Central Station where particles of disparate photons are fused into three-dimensional perceptions, some of them burned into the brain like inky tattoos.<\/p>\n

Oh yes, I say, you most certainly have a brain. Technically, anyway.\u00a0 I\u2019ll be sure to tell your wife.<\/p>\n

He smiles, which causes the image to shift again. I make the necessary adjustments and continue.<\/p>\n

Occasionally, he will get more philosophical than funny and ask if I can see his soul. The dark, round window through which I peer is alleged to reveal its core, but all I see is living tissue and corpuscles shuffling along like harried commuters in branching tubes, hurrying off to deliver their life-giving load. This leads me to believe that flesh and spirit cannot be so easily cleaved–sorry, Plato.<\/p>\n

\u201cI bet you see some Cadillacs<\/em> back there, don’cha?\u201d<\/p>\n

It\u2019s an old joke, but I still have to be careful, since some patients believe that \u201cCadillacs\u201d really are<\/em> \u201ccataracts\u201d and not just a play on words.\u00a0 This reminds me of a missed opportunity, that what I should have done at the outset of my career was to keep a journal and compile all the funny mispronunciations and misperceptions, perhaps publishing them in a book entitled, Patients Say the Blindest Things<\/em>.<\/p>\n

No, I don\u2019t see any \u201cCadillacs.\u201d Not even a Toyota.\u00a0 And there\u2019s no guacamole, I mean glaucoma, either.<\/p>\n

Obviously, I can dish it out as well as I can take it.<\/p>\n

He is silent for awhile, allowing me to finish the exam with relatively few tremors. As I move the scanning beam across the back of his eye, a quirk of brain physiology affords him a fleeting flash of my view. This startles him, and he leans back into his chair, his face the chalky, pallid white of someone who has possibly seen a ghost.<\/p>\n

\u201cWhat was that? Was that the back of my eye? I wish that I could see what you\u2019re seeing. Is there any way I can?\u201d<\/p>\n

Yes, I say, let me show you.<\/p>\n

I have him lean back into the headrest for stability and close his eyes. I take a thin, curved reed of a flashlight and touch his lids on the outside corner, at the angle where the upper and lower meet, and begin to gently massage. The combination of internal illumination and mechanical touch stimulates the retinal cells to generate phosphenes, sparks of light which form a negative afterimage of the blood vessels which course throughout his retina and divide like the branches of a tall, primeval tree.<\/p>\n

It is a pattern that is often repeated in nature, from the veins on a leaf to the bifurcating, tumbling tributaries of a mighty river. It marks each of us for life, as unique as a fingerprint. The entoptic phenomenon enables him to gain my perspective, to see through my eyes. Sometimes he sits in silent wonder, and at others he whistles softly or merely says, \u201cAh, now<\/em> I see.\u201d<\/p>\n

It would be awkward to keep this up for too long, but I continue long enough for him to get the gist. For a few seconds, at least, as the swirl of my busy office and the turmoil of these days spin like a counterclockwise cyclone around us, the two of us sit together in the eye of the storm, bobbing gently along calm, smooth waters, hopeful that a mere glimpse into such penetrating mysteries will be food enough to sustain us for the long haul ahead.<\/p>\n","protected":false},"excerpt":{"rendered":"

entoptic phenomena: Events taking place totally within the eye The way my patients squint and squirm in the chair, you\u2019d think I was coming at them with a dentist\u2019s drill. Or worse yet, a serpentine colonoscope,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,36,70,51],"tags":[],"class_list":["post-5390","post","type-post","status-publish","format-standard","hentry","category-current-events","category-eyes","category-health-care","category-religion"],"_links":{"self":[{"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/posts\/5390","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5390"}],"version-history":[{"count":42,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/posts\/5390\/revisions"}],"predecessor-version":[{"id":5434,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=\/wp\/v2\/posts\/5390\/revisions\/5434"}],"wp:attachment":[{"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ocularfusion.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}