Vision affects the way you move through daily life, from reading and driving to recognizing faces and navigating familiar spaces.
Some eye diseases can cause permanent vision loss or blindness when they are not detected and managed early.
Many serious eye conditions can be treated, managed, or monitored more effectively when they are detected early. This guide explains common eye diseases that cause blindness, their warning signs, and when to see your optometrist.
Common Eye Diseases That Can Cause Blindness
What are the worst eye diseases for long-term vision? The most serious conditions are those that can damage the retina, optic nerve, cornea, or lens and lead to permanent vision loss if they are not treated.
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Glaucoma
Glaucoma is a group of eye diseases that damage the optic nerve. It is often associated with high eye pressure, although some people develop glaucoma with normal eye pressure.
It often goes unnoticed and untreated until significant vision loss happens, which can be permanent.
Symptoms
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Gradual loss of peripheral vision
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Tunnel vision (in advanced stages)
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Severe pain in the eye, redness, and blurred/distorted vision (in acute cases)
Causes
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Genetic predisposition
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High intraocular pressure
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Age and ethnicity
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Eye Shape
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Anything that causes inflammation
Treatment
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Eye drops to lower pressure
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Laser treatment/therapy
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Surgery (to improve drainage)
Regular comprehensive eye exams help detect glaucoma and other serious eye conditions early, often before symptoms are noticeable.
2. Age-Related Macular Degeneration (AMD)
AMD affects the macula, the central part of the retina, which plays a vital role in detailed vision. This can lead to the loss of central vision and blindness in people over 50. AMD makes routine tasks difficult. Examples include reading, driving, and recognizing faces.
Types
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Dry AMD: The more common form, which usually progresses more slowly. The cells responsible for fine, detailed vision break down.
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Wet AMD: A less common but more advanced form that can cause faster vision changes. There is bleeding in the central retina.
Symptoms
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Unclear, blurred central vision
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Distorted central vision (straight lines appearing wavy)
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Dark or empty spots in the center of the vision
Causes
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Genetics
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Aging
Treatment
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Treatment may include anti-VEGF injections or other retina-specialist care, depending on the type and stage of AMD.
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Eye supplements
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Best prevention tip: Don't skip your annual eye exams, especially after age 50.
3. Diabetic Retinopathy
Diabetic retinopathy is a diabetes-related eye disease that affects the blood vessels of the retina. Diabetic retinopathy can often be managed, especially when it is detected early and blood sugar, blood pressure, and eye care are monitored closely. If not managed or treated correctly, the damage to the retina accelerates, leading to advanced problems like macular edema and retinal detachment which can ultimately cause blindness.
Symptoms
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Blurred or unclear vision
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Fluctuations in vision
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Floaters or dark spots
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Vision loss
Causes
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Poor blood sugar control
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Smoking makes diabetic retinopathy
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Processed foods and seed oils accelerate inflammation and contribute to the worsening of diabetic retinopathy
Treatment
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Effective blood sugar control
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Laser treatment
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Anti-VEGF Injections into the eye
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Vitrectomy surgery
Quick tip: If you are diagnosed with diabetes, get a comprehensive eye exam at least once a year.
4. Cataracts
Cataracts represent a normal time related change involving clouding of the lens inside the eye. Although cataracts are very common, untreated cataracts can cause blindness.
Symptoms
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Foggy, cloudy, or blurry vision
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Vision difficulty at night
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Light and glare sensitivity
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Seeing halos around lights
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Fading colors
Causes
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Aging
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Uncontrolled diabetes
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Smoking and alcohol use
Treatment
Cataract surgery to replace the human cloudy lens with a clear man made lens.
Good to know: Cataract surgery is very common and can improve vision for many patients. Complications are rare in compliant patients.
5. Retinitis Pigmentosa (RP)
RP is a group of inherited diseases that damage the retinal cells. Retinitis pigmentosa is a genetic condition that causes gradual vision loss over time.
Symptoms
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Night blindness
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Loss of peripheral vision
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Difficulty adjusting to dark spaces or environments
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Tunnel vision (leading to complete blindness)
Causes
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Genetic mutations
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Genetic predisposition (family history)
Treatment
There is no cure for most forms of retinitis pigmentosa. Low-vision aids and vision rehabilitation can help people make the most of their remaining vision.
Important: If Retinitis Pigmentosa runs in your family, it’s best to consider consulting a genetic counselor.
6. Retinal Detachment
Retinal detachment occurs when the top 9 layers of the retina separate from the base layer. This can lead to vision loss and possible blindness if not treated promptly.
Symptoms
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Sudden onset of vision disruptions like floaters and flashes
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Curtain or shadow or cloud that moves over the visual field and does not go away.
Causes
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Eye trauma
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Advanced stage diabetic retinopathy or other retinal disease.
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High myopia (nearsightedness) makes the eyeball longer and puts the nearsighted patient at higher risk for retinal detachment.
Treatment
Retinal detachment is a medical emergency. Treatment may include laser or cryotherapy surgery. Patients should seek care right away if symptoms appear.
7. Leber Hereditary Optic Neuropathy (LHON)
LHON is a genetic disorder that causes sudden painless loss of vision. This is seen most often in young adult males.
Symptoms
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Sudden and painless vision loss in one eye
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Central vision loss
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Reduced color vision
Causes
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A genetic mutation that is more common in males
Treatment
This disease has no cure currently. However, treatments such as synthetic CoQ10 and treatment of the underlying condition can help manage symptoms.
Note: Early medical attention is integral to helping preserve some vision in a subset of patients receptive to such treatments..
8. Anophthalmia and Microphthalmia
Anophthalmia is the absence of one or both eyes at birth. On the other hand, microphthalmia is the presence of abnormally small eyes. Both these issues can lead to blindness.
Symptom
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Absence or small size of one or both eyes
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Vision loss
Causes
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Genetic mutations
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Environmental factors during fetal development
Treatment
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Prosthetic eyes for cosmetic purposes
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Vision rehabilitation
9. Corneal Diseases
The cornea is the transparent front layer of the eye. Conditions like keratoconus, corneal ulcers, or herpes simplex keratitis can damage or cloud the cornea, potentially leading to severe vision loss or blindness.
Symptoms
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Redness with pain
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Hazy, unclear, or blurry vision
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Sensitivity to light
Causes
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Infections
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Eye injuries or trauma
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Genetic or degenerative conditions
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Contact lens overwear
Treatment
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Prescription eye drops
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Corneal transplants or surgery in severe cases
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Discontinuation of contact lens wear
Prevention tip: Keep your eyes and contact lenses clean and reduce risk of eye injuries by not over wearing your contacts and wearing protective eyewear in hazardous environments.
10. Trachoma
Trachoma is a chronic inflammation of the cornea and eyelids that is caused by repeated infection with Chlamydia. It is the leading infectious cause of blindness worldwide. Trachoma is more common in areas with limited access to clean water and sanitation. Repeated infections can severely damage eyelashes, causing them to turn inward and scratch the cornea. If this scratching is left untreated, it can lead to blindness.
Symptoms
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Irritation or itching in the eye
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Redness, bumps under the eyelids
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Unpleasant discharge from the eyes
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Eyelashes turning inward, called trichiasis, which can scratch the cornea and cause pain or damage
Causes
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Bacterial infection caused by Chlamydia trachomatis
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Poor body, facial, and eye hygiene (especially in children)
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Contaminated hands, clothes, furniture, or towels spread the bacteria
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Flies that transmit the infection from person to person
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Living in dirty, overcrowded, unsanitary conditions
Treatment
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Antibiotics
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Facial cleanliness and hygiene
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Surgery in advanced cases
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WHO recommends the SAFE strategy for trachoma: surgery for advanced disease, antibiotics to clear infection, facial cleanliness, and environmental improvement.
11. Stroke-Related Vision Loss
A stroke affects the visual cortex or other areas of the brain that are involved in vision. This can trigger sudden vision loss or blindness.
Symptoms
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Sudden vision loss in one or both eyes
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Double vision
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Difficulty with visual perception
Causes
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Bleeding or blockage in the brain's blood vessels
Treatment
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Call emergency services immediately for sudden vision loss, double vision, facial drooping, weakness, confusion, or trouble speaking.
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Vision rehabilitation
12. Nutritional Deficiencies
Nutritional deficiencies, especially vitamin A deficiency, can cause serious vision problems when left untreated.
Deficiencies in essential vitamins and minerals, especially vitamin A, can cause vision loss and even blindness if not treated properly.
Symptoms
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Night blindness
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Dry eyes
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Vision loss
Causes
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Poor diet
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Malnutrition
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Limited access to nutritious food or medical care
Treatment
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Positive dietary and lifestyle changes
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Supplementation with the deficient nutrient
How to Lower Your Risk of Vision Loss
Some causes of vision loss can be managed more effectively when they are found early. These steps can help you protect your vision and reduce risk.
Annual Eye Exams
Knowing what can make you go blind is important, but annual eye exams are one of the most practical ways to detect problems early. Even if your vision seems normal, annual eye exams can detect problems early - before symptoms appear.
Manage Chronic Conditions
Diabetes, high blood pressure, and autoimmune conditions can affect the eyes. Work with your healthcare team to manage these conditions.
Eat Well for Your Eyes
Include fatty meats, fish, and antioxidant-rich foods in your diet to support overall eye health. Avoid seed oils and processed foods. Quality supplementation can be extremely useful.
Wear Protective Eyewear
Protective eyewear is essential. Whether at home, on a job site, or playing sports, protect your eyes from injuries that could lead to vision loss.
Stop Smoking and Alcohol Use
Smoking and excess consumption of alcohol are both injurious to your eye health. Smoking increases your risk for AMD, cataracts, and optic nerve damage. Quitting helps preserve your sight.
Limit Screen Time
Excessive use of digital devices can cause various eye problems. Reduce eye strain by practicing the 20-20-20 rule: every 20 minutes, look 20 feet away for 20 seconds. Avoid spending excessive time on digital devices to improve your vision and enjoy life to its fullest.
Remember, many causes of blindness are preventable or treatable when caught early. Your vision is worth the investment of your time for your annual eye exam.
Key Takeaways
Blindness can result from many different eye diseases. Each comes with its own symptoms, causes, and treatments. Early detection and timely intervention will help manage these conditions and prevent further loss.
Annual eye exams and a healthy lifestyle are your eyes' best friends. They significantly reduce the risk of developing serious eye disease.
If you notice any changes in your vision, it is essential to see your optometrist right away. Schedule your annual eye exam today.
