Causes of Eye Disorder


Nearsightedness (myopia)
Nearsightedness, or myopia, is a very common condition in which nearby objects are visible but faraway objects are out of focus and difficult to see.
Understand this condition. »

Farsightedness
Farsightedness, or hyperopia, is a common vision impairment in which you are able to see things that are far away, but have trouble seeing things that are up close.
Recognize the signs. »

Astigmatism
Astigmatism is a common vision problem that causes distorted, fuzzy, or blurry vision as a result of an irregular curve in the eye's lens or cornea.
Learn about how it's diagnosed. »


Presbyopia
Presbyopia causes people's eyes to be unable to focus as quickly on close-up objects. It naturally affects everyone's eyes as they age.
Heed the early warning signs. »


Cataract
Cataracts are dense, cloudy areas that slowly form in the lens of the eye. They are common in older people, but can also be present at birth or caused by medications, disease, trauma, or radiation.
Look out for the signs. »


Eye floaters
Specks and strings may appear in your field of vision. These are called eye floaters, and are most commonly caused by agerelated changes to the eye.
Read more on this condition. »



Dry eyes
When the eyes do not produce enough tears, this results in dry eyes. It can be caused by environmental factors, dry eye
syndrome, medications, and other causes as well.
Manage your symptoms. »


Visual disturbances
When a condition or disorder temporarily or permanently interferes with the normal sense of sight, this is called a visual disturbance.
Understand possible complications. »


Glaucoma
Glaucoma refers to a number of diseases that damage the optic nerve and can lead to vision loss. It is usually caused by abnormally high pressure inside the eye.
Weigh treatment options. »


Bleeding under conjunctiva (subconjunctival hemmorhage)
If blood has collected under the conjunctiva, the transparent tissue that covers the white of the eye, this is called a subconjunctival hemorrhage. This is not a dangerous condition, and tends to go away by itself within a few weeks.
Recognize the signs. »


Retinal detachment
When the retina separates from the back of the eye, this is known as retinal detachment. It is a medical emergency that can cause partial or total vision loss.
Seek medical attention right away. »


Lazy eye
When the brain does not properly acknowledge the information it receives from one of your eyes, this results in a lazy eye, or "amblyopia." This condition normally occurs only in children and usually affects just one eye, which may "wander" around. It can cause serious vision damage if it goes untreated.
Learn exactly what this condition does. »



Pterygium
Pterygium is a benign, noncancerous growth that develops on the mucous membrane on the white part of the eye. Although they usually don't need treatment, they can be removed if they cause vision problems.
Determine the best treatment for you. »


Diabetic retinopathy
Diabetic retinopathy causes vision problems as a result of type 1 or 2 diabetes, which can damage the blood vessels of the eye's retina. It may start as minor visual problems but it can eventually cause blindness.
Reduce your risk. »


Night blindness
Night blindness is a form of vision impairment that causes affected individuals to have difficulty seeing in the dark or in dim lighting. It is usually a result of eye conditions such as nearsightedness or cataracts.
Find out what might be causing it. »



Visual impairment
If glasses or contact lenses cannot correct someone's vision, this is known as a visual impairment. Impairments range from low vision and color blindness to total blindness.
See the range of possible problems. »


Eye and vision development
The human visual system is very complex and takes a while to fully develop. This system's development is a very important health consideration.
Discover how the visual system develops. »


Hypertensive retinopathy
Hypertensive retinopathy is a condition in which high blood pressure causes vision problems by limiting the retina's function and increasing pressure on the optic nerve.
Control your vision and blood pressure. »



Color blindness
Color blindness is an inherited or acquired condition in which the patient has difficulty telling apart certain colors or cannot see any colors at all. It is more common in men than in women.
Know when to get checked. »


Blindness
Blindness is the inability to see anything, including light. It can be partial or complete, and can be caused by a number of different diseases, or be present at birth.
Gain insight into blindness. »


Strabismus
Strabismus, or "crossed eyes," causes the eyes to not line up in the same direction. It tends to develop in children who are very young, and is often treatable.
Address your child's condition. »



Hazy vision
Hazy vision is a problem that makes it difficult to see clearly. It can be caused by a number of different factors.
Assess your symptoms. »


Photophobia
Photophobia, or light sensitivity, is when bright lights hurt your eyes. It can be associated with a number of conditions,
ranging from minor to very serious.
Find out whether it's serious. »


Ocular migraines
An ocular migraine, or migraine with aura, is a migraine that is accompanied by a visual disturbance.
Pinpoint your triggers. »



Retinitis pigmentosa
Retinitis pigmentosa is a group of conditions that are inherited and gradually bring about blindness. These conditions result to abnormal aspects of the retina, particularly the rods.
Read more about these conditions. »