When I turned 23, my eyesight started to wobble, and the medical team was left scratching their heads. This is the top 10 terrifying roster of conditions that can steal your sight, illustrated by my own two‑year odyssey through endless referrals and baffling test results.
10 Brain Tumor
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“Mass lesion.” Those two ominous words, scribbled in a hurried hand on a medical pad, felt like a death sentence. I caught a glimpse of the note while the optometrist stepped out, and my mind instantly raced to funeral plans. The eye chart I’d just struggled with confirmed something was off, and right beneath the alarming headline lay the results of my visual‑field test, which revealed massive scotomas—blind spots—in both eyes.
The scotomas showed a striking symmetry: the left eye suffered a major defect in its upper‑left quadrant, while the right eye’s problem sat in the upper‑right quadrant. The optometrist theorized that a tumor might be pressing on my optic chiasm—the crossroads where the optic nerves intersect at the base of the brain. Such pressure could explain the bilateral field loss I was experiencing.
The visual‑field exam was ordered after it became clear I couldn’t read the 20/20 line even with my corrected glasses—a red flag usually reserved for older adults, not a 23‑year‑old. This discrepancy set off alarm bells and pushed the investigation toward a possible intracranial mass.
Of course, the optometrist couldn’t confirm a diagnosis on the spot, so “mass lesion” was a referral cue, not a final verdict. He promptly arranged an MRI to see if a tumor was the culprit stealing my sight.
After what felt like an eternity—four days that stretched into an agonizing marathon—the MRI finally arrived. The scan was clean: no tumor, no sinister growth. I was spared a fatal diagnosis, yet the mystery of my disappearing vision remained unsolved. The remaining entries on this list represent the other possibilities my doctors considered, and one that ultimately turned out to be the truth.
9 Retinitis Pigmentosa
Commonly abbreviated as RP, retinitis pigmentosa is exactly as frightening as its name suggests. Picture your peripheral vision slowly eroding, turning your wide‑angle view into a narrowing tunnel that eventually collapses, leaving you in total darkness.
The condition earns its name because it causes the breakdown and loss of retinal cells—the light‑sensing tissue lining the back of the eye. Over 50 genes are implicated, each essential for the health of photoreceptors, the rods and cones that detect light and color. Though rare, RP isn’t unheard of; roughly one in every 4,000 people worldwide wrestles with it.
Early RP typically manifests as night blindness and a gradual shrinkage of the visual field. Progression rates differ, but most sufferers eventually lose most of their sight, making everyday tasks—reading, driving, navigating, recognizing faces—extremely challenging. Fun, right?
One diagnostic tool for RP is the electroretinogram (ERG), which measures electrical responses of the photoreceptors. A diminished response points to fewer functional cells, confirming RP. In my case, the ERG returned normal results, ruling this disease out.
8 Macular Degeneration
Macular degeneration stands as the leading cause of vision loss in the United States, affecting over 10 million people—more than cataracts and glaucoma combined. Unlike cataracts, which are surgically removable, or glaucoma, which can be managed with medication, macular degeneration is essentially incurable and largely unstoppable.
The disease attacks the macula, the central portion of the retina responsible for sharp, detailed vision. We rely on the macula for reading, driving, distinguishing colors, and recognizing faces. When it deteriorates, central vision blurs or disappears.
Prognoses vary wildly. Some patients experience no noticeable loss, while others see wavy or blurred vision that progresses to complete central vision loss, leaving only peripheral sight—a reversal of the tunnel‑vision effect seen in RP.
Two main forms exist: “dry” macular degeneration, which accounts for roughly 85‑90 % of cases and involves the buildup of yellow deposits called drusen beneath the macula, and “wet” macular degeneration, where abnormal blood vessels grow and leak fluid, causing rapid, severe vision loss.
Wet macular degeneration’s leaky vessels can cause sudden, dramatic deterioration, whereas dry forms tend to progress more slowly, often preserving a functional visual acuity around 20/40.
Age‑related macular degeneration typically appears later in life, but a rarer form called Stargardt disease can strike younger individuals. My macula, however, was perfectly healthy, eliminating this condition from my differential.
7 River Blindness
When doctors encounter an unexplained vision loss, they often ask seemingly obscure questions—like whether you’ve recently visited Africa or any tropical region. This line of inquiry aims to rule out the infamous “River Blindness,” formally known as onchocerciasis.
Onchocerciasis is transmitted by the bite of a blackfly that breeds near fast‑flowing rivers, hence the nickname. The tiny worm released by the fly multiplies into countless microfilariae that wander into the skin and eyes. When these larvae die, they release toxic substances that cause intense itching and eye lesions, eventually leading to irreversible blindness and disfiguring skin disease.
In some West African villages, up to 50 % of men over 40 have been blinded by this parasite. Fortunately, I had never set foot in Africa, Latin America, or any region where the disease is endemic, so this diagnosis was swiftly dismissed.
6 Lead Poisoning
“Have you ever been exposed to old paint, rusty pipes, or water that didn’t taste fresh?” That blunt question is the medical equivalent of asking if you’ve been eating paint chips.
Lead poisoning isn’t just a brain‑affecting issue; it can also wreak havoc on the optic nerve, the conduit that carries visual information to the brain. Damage to this nerve can manifest as difficulty seeing in low light, blurriness, chronic irritation, and an increased risk of cataract formation—though cataracts are unlikely in someone in their early twenties.
The doctors needed to rule out lead exposure, especially after the Flint, Michigan water crisis reminded everyone how pervasive and preventable lead toxicity can be. Historically, lead has been embedded in gasoline, paint, crafts, and plumbing, making exposure a real concern.
Fortunately, widespread lead exposure in developed nations is now rare, and my tests came back clean, eliminating this as a cause of my visual decline.
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5 Nonarteritic Anterior Ischemic Optic Neuropathy
… is a mouthful for what doctors call an “ocular stroke.” In this condition, the optic nerve suddenly suffers a drop in blood flow, depriving it of oxygen and nutrients. The event can be isolated to the eye or part of a larger cerebrovascular incident.
Like any stroke, the severity ranges widely. Approximately one in 10,000 people experience this, including notable New York Times columnist Frank Bruni, who penned a poignant piece titled “Am I Going Blind?” describing his own brush with the disorder.
Bruni’s narrative captures the terror: “They say death comes like a thief in the night; lesser vandals have the same M.O. The affliction that stole my vision, or at least a big chunk of it, did so as I slept. I went to bed seeing the world one way. I woke up seeing it another.” He likened the visual loss to a “thick, dappled fog” that clouded half of his visual field, leaving him feeling “drunk without being drunk.”
Patients who survive an ocular stroke often live with lingering vision loss and the constant dread that another event could strike the remaining eye. Bruni estimated a 20 % chance of a repeat episode over five years, essentially a one‑in‑five risk of functional blindness.
My own visual pattern didn’t fit the classic picture of an ocular stroke, so while NAION remained a “maybe,” it never became the leading suspect.
4 Devic’s Disease
One of the disorders that most closely mirrored my symptoms was Devic’s Disease, also known as neuromyelitis optica. Think of it as multiple sclerosis on steroids: both attack the nervous system, but Devic’s tends to be far more aggressive.
While classic MS often presents with optic neuritis affecting a single eye, Devic’s typically produces sizable scotomas—blind spots—in both eyes. My examinations confirmed bilateral vision loss, and a neuro‑ophthalmologist noted that my optic nerves were thinner than average, suggesting the cables (nerve fibers) were frayed even though the cameras (eyes) themselves were intact.
Devic’s is brutally unforgiving. Like its cousin MS, it involves immune‑mediated attacks on the optic nerves and spinal cord, but its relapses are often more severe, causing abrupt, profound loss of sight and mobility. Symptoms can range from blindness in one or both eyes to weakness, painful spasms, loss of sensation, uncontrollable vomiting, and bladder or bowel dysfunction.
An MRI of my spine returned inconclusive, prompting a spinal tap—an invasive procedure that extracts cerebrospinal fluid for analysis. The fluid showed no definitive signs of Devic’s or MS, leaving the mystery alive.
Although the tap was normal, the search for the true cause persisted, and Devic’s remained on the differential list for a while.
3 Coloboma of the Eye
Derived from the Greek word meaning “curtailed,” coloboma refers to a group of congenital anomalies where normal eye tissue is missing. This can involve the macula, lens, uvea, optic nerve, or even the eyelids. The visual impact ranges from negligible to severe, depending on the structures involved.
If my case had been confirmed, it would have been a moderate optic‑nerve coloboma—a hollowed‑out segment of the optic passage. Since colobomas are present from birth, they often go unnoticed until adolescence or early adulthood when routine eye exams reveal subtle deficits.
My mother suffered from preeclampsia during pregnancy, a condition that can restrict oxygen flow to the fetus and potentially cause birth defects. This connection offered a plausible explanation for a congenital eye anomaly, especially given the tragic loss of my mother during a later pregnancy.
However, most colobomas are genetic, and there was no family history of the condition. With no definitive test to confirm its presence, coloboma remained a “maybe”—a hopeful possibility, as colobomas rarely worsen over time.
2 Leber’s Syndrome
Officially termed Leber Hereditary Optic Neuropathy (LHON), Leber’s Syndrome is a mitochondrial disease that attacks retinal ganglion cells and their axons, the nerve fibers that funnel visual signals to the brain. Although it predominantly affects young men, the mutation is passed down exclusively from mothers, since mitochondria are inherited maternally.
LHON typically presents with a sudden onset of visual loss, first affecting one eye and then the other within weeks. In about a quarter of cases, both eyes go dark simultaneously. The disease swiftly leads to optic atrophy and a permanent drop in visual acuity.
During the acute phase, affected eyes display a fluid‑filled appearance of the nerve fiber layer and enlarged or damaged peripapillary vessels. A relative pupillary defect may also be evident, reflecting the eye’s struggle to gather light.
Two hallmark signs of LHON aligned with my symptoms: impaired color vision and cecocentral scotomas—blind spots that originate at the natural blind spot where the optic nerve exits the eye and then expand outward. These features would have signaled LHON, but my diagnostic work‑up did not support it.
Had I been afflicted with Leber’s, I would likely be nearly blind today. Fortunately, the condition was ruled out.
1 Dominant Optic Atrophy
After nearly two years of diagnostic limbo, the doctors arrived at a conclusion by process of elimination: Dominant Optic Atrophy (DOA). This unsettlingly named disorder is loosely defined but revolves around the gradual degeneration of the optic nerves.
Also known by its acronym DOA, the condition is hereditary—hence the “dominant” label. My father’s history of mild optic neuritis offered a genetic clue, suggesting a familial pattern.
DOA typically emerges in the first decade of life, with affected individuals experiencing moderate visual loss and color‑vision deficits. The severity is highly variable: some retain near‑normal vision, while others slip into legal blindness (20/200 corrected).
The disease remains a medical enigma; mutations in several genes have been implicated, and some responsible genes are still unidentified. At present, there is no cure or preventive measure for DOA.
Adding a twist of fate, DOA carries a “Sword of Damocles” quality—it can pause for years, then suddenly restart without warning. Thankfully, it’s been over 15 years since I’ve noticed any measurable decline, but the specter of further loss lingers in my mind.
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About The Author: Christopher Dale (@ChrisDaleWriter) writes on politics, society and sobriety issues. His work has appeared in Daily Beast, NY Daily News, NY Post and Parents.com, among other outlets.