David, a 28-year-old designer in the prime of his career, had been staying up late for days to meet project deadlines. After a long work session, he suddenly noticed "swarms of mosquitoes" flying in his visual field.
Thinking it was just eye strain from exhaustion, David dismissed it as something that would resolve with rest and didn't pay much attention.
However, just three days later, a terrifying incident occurred—David's left eye suddenly experienced a large area of vision loss.
Panicked, he rushed to the hospital and was diagnosed with retinal detachment. Fortunately, due to timely medical intervention, his vision partially recovered after treatment.
According to the WHO's World Vision Report, at least 2.2 billion people worldwide had vision impairment in 2020. What exactly is "destroying" modern people's eyes? Let's explore further.
Modern life moves at a fast pace, with high work pressure and irregular schedules. Staying up late for work has become the norm for many "Davids."
Nighttime, originally a prime time for eyes to rest and recover, is now forced into "overtime." Prolonged exposure leads to various eye "malfunctions," such as dryness, itchiness, and discomfort.
Besides late-night work, many young people have the habit of scrolling on their phones in the dark. Little do they know, this dark environment can elevate intraocular pressure, significantly increasing the risk of glaucoma and even blindness.
Prolonged high-intensity close-up use of electronic devices further "exacerbates" eye strain.
A South Korean study published in PLOS One found that four hours of continuous smartphone use significantly increases eye fatigue, burning, and dryness indices.
Researchers suggest the primary culprit is likely the blue light emitted by electronic screens.
Excessive exposure to blue light may cause oxidative damage and inflammation in retinal and corneal cells, worsening eye discomfort while increasing the risk of dry eye syndrome and other conditions.
Additionally, many people instinctively rub their eyes when experiencing dryness, itchiness, or discomfort.
However, our hands carry numerous bacteria and viruses. Once they enter the eyes, they can lead to conjunctivitis, keratitis, and other ocular diseases.
Vigorous rubbing may also cause corneal epithelial detachment, triggering symptoms like eye pain, photophobia, and tearing.
These habits quietly "erode" eye health, making vision impairment increasingly severe and widespread.
Early detection and timely treatment can greatly reduce the occurrence of these issues.
If your eyes exhibit the following four abnormalities, they may be "distress signals." These seemingly minor issues could be early warnings of serious eye problems:
Frequent "floaters" in the visual field
Sudden appearance of black shadows or small circles dancing like mosquitoes in the visual field is generally a sign of vitreous degeneration, not a "superpower" to see bacteria.
The vitreous is a transparent gel-like substance inside the eyeball. As we age, the vitreous may undergo liquefaction and degeneration, with collagen fibers coagulate into strands or clumps and float inside the eye, causing vitreous opacity, also known as "floaters."
Generally, floaters are more common in the elderly, but factors like high myopia, prolonged close-up work, and excessive UV exposure can accelerate vitreous degeneration.
Most cases of floaters are benign, but if the number of floaters suddenly increases, or is accompanied by flashes of light or vision loss, it could be a precursor to retinal detachment. Without timely surgical repositioning, it may lead to permanent blindness.
Cyanotic pupil
Normally, our pupils are black. When the pupil appears cyanotic, it may indicate glaucoma.
Glaucoma is a dangerous eye disease that causes a sudden rise in intraocular pressure, compressing the optic nerve and leading to corneal edema, which gives the pupil a cyanotic reflection.
Normal intraocular pressure ranges from 10 to 21 mmHg, with a difference of no more than 4-5 mmHg between the two eyes. Pressure exceeding this range may indicate glaucoma.
Some mistakenly believe glaucoma only affects the elderly, but in reality, people with high myopia, a family history of glaucoma, or conditions like diabetes and hypertension are also at high risk.
Without timely treatment, it may cause irreversible vision loss or even blindness.
White spot on the black part of the eye
If a white spot or opacity suddenly appears in the center of the black part of the eye (cornea), it may be an early sign of cataract.
Cataract, also known as lens opacity, occurs when the lens proteins in the eye undergo metabolic disorders due to various causes, leading to degeneration and opacity.
As the white spot grows larger and whiter, the condition worsens. Without timely intervention, once the entire pupil is covered by the white opacity, blindness may result.
"Mole" in the eye
Black spots in the eye, medically known as "conjunctival nevi," are generally benign. These small spots usually appear in childhood and often remain unchanged for life.
However, special attention is needed if the spot suddenly enlarges, darkens, or becomes uneven in color—these could be signs of malignancy. Immediate medical consultation is required.
According to a study in Ophthalmology, only 1% of patients experience malignant transformation. Though the probability is low, the malignancy is highly aggressive, and metastasis significantly increases fatal risks.
Beyond monitoring these signals, how else can we protect our eyes and prevent ocular diseases?
Good Habit 1: Wear sunglasses outdoors
Strong UV rays in sunlight can damage the eyes, increasing the risk of cataract, keratitis, macular degeneration, and other ocular diseases.
When engaging in outdoor activities, choose sunglasses with brown or amber lenses. They absorb most UV and blue light, and their softer tone compared to pure black can help reduce visual fatigue and protect vision.
Good Habit 2: Take breaks to look into the distance
Prolonged close-up, high-intensity eye use keeps the ciliary muscles constantly tense. Looking into the distance helps relax these muscles and restore their ability to adjust focus.
To practice, stare at your fingerprint for 10 seconds at close range, then shift your gaze to the farthest possible point and focus for 5 seconds. Repeat every 30-40 minutes.
Good Habit 3: Apply warm compresses
Applying a warm towel to the eyes promotes blood vessel dilation and accelerates blood circulation, helping to relieve eye fatigue.
Soak a towel in 40°C (approx.) hot water, wring it out, and place it over closed eyes for no more than 20 minutes daily.
Good Habit 4: Regular eye exams
"Early detection" can prevent many serious eye diseases from developing.
It's recommended to have a vision check every 6 months, including tests for visual acuity, axial length, corneal curvature, and refractive error.
Those with a family history of eye diseases, high myopia, or existing ocular conditions may need more frequent exams.
The eyes are the windows to the soul, and their health impacts every aspect of our lives. Never ignore eye abnormalities—seek medical attention promptly if any occur.
