The cornea is the clear outer layer of the eye. If it is damaged by disease, infection, or injury, vision problems may occur. Corneal problems can be detected by having an eye exam. Corneal problems can be prevented by protecting the eyes from injury and avoiding contact with people who have eye infections. Read more: Corneal Disease Article
Multimedia: Slideshows, Images & Quizzes
Common Eye Problems and Infections
Eye diseases can cause damage and blindness if not detected and treated soon enough. Learn the warning signs and symptoms of...
Picture of Astigmatism
Astigmatism is a common form of visual impairment in which an image is blurred due to an irregularity in the curvature of the...
Related Disease Conditions
Headaches can be divided into two categories: primary headaches and secondary headaches. Migraine headaches, tension headaches, and cluster headaches are considered primary headaches. Secondary headaches are caused by disease. Headache symptoms vary with the headache type. Over-the-counter pain relievers provide short-term relief for most headaches.
The definition of a genetic disease is a disorder or condition caused by abnormalities in a person's genome. Some types of genetic inheritance include single inheritance, including cystic fibrosis, sickle cell anemia, Marfan syndrome, and hemochromatosis. Other types of genetic diseases include multifactorial inheritance. Still other types of genetic diseases include chromosome abnormalities (for example, Turner syndrome, and Klinefelter syndrome), and mitochondrial inheritance (for example, epilepsy and dementia).
Fatigue can be described in various ways. Sometimes fatigue is described as feeling a lack of energy and motivation (both mental and physical). The causes of fatigue are generally related to a variety of conditions or diseases, for example, anemia, mono, medications, sleep problems, cancer, anxiety, heart disease, and drug abuse.Treatment of fatigue is generally directed toward the condition or disease that is causing the fatigue.
Nausea and Vomiting (Causes, Natural Remedies, Diet, Medication)
Nausea is an uneasiness of the stomach that often precedes vomiting. Nausea and vomiting are not diseases, but they are symptoms of many conditions. There are numerous cases of nausea and vomiting. Some causes may not require medical treatment, for example, motion sickness, and other causes may require medical treatment by a doctor, for example, heart attack, lung infections, bronchitis, and pneumonia. Some causes of nausea and vomiting may be life threatening, for example, heart attack, abdominal obstruction, and cancers. Treatment of nausea and vomiting depends upon the cause.
An allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances. When these allergens come in contact with the body, it causes the immune system to develop an allergic reaction in people who are allergic to it. It is estimated that 50 million North Americans are affected by allergic conditions. The parts of the body that are prone to react to allergies include the eyes, nose, lungs, skin, and stomach. Common allergic disorders include hay fever, asthma, allergic eyes, allergic eczema, hives, and allergic shock.
Glaucoma is a common eye condition in which the fluid pressure inside the eye rises because of slowed fluid drainage from the eye. If untreated, glaucoma may damage the optic nerve and other parts of the eye, causing the loss of vision or even blindness.
Chronic pain is pain (an unpleasant sense of discomfort) that persists or progresses over a long period of time. In contrast to acute pain that arises suddenly in response to a specific injury and is usually treatable, chronic pain persists over time and is often resistant to medical treatments.
Keratitis is inflammation of the cornea. Symptoms and signs include pain, tearing, blurred vision, eye redness, watery eyes, or the cornea may appear gray or white. Treatment of keratitis depends upon the underlying cause of the inflammation.
Omega-3 Fatty Acids (Benefits, Uses, Foods)
Omega-3 fatty acids are essential fats that help decrease one's cholesterol and triglyceride levels as well as reduce the risk of coronary artery disease. Omega-3s are found in: salmon, sardines, walnuts, and canola oil. These fats may help reduce the risk of ventricular fibrillation and sudden cardiac death.
Dry eyes are caused by an imbalance in the tear-flow system of the eye, but also can be caused by the drying out of the tear film. This can be due to dry air created by air conditioning, heat, or other environmental conditions. Treatment may involve self-care measures, medications, or rarely, surgery.
Eye Care and Eye Disorder
Many common eye disorders resolve without treatment and some may be managed with over-the-counter (OTC) products. It's important to visit a physician or ophthalmologist is the problem involves the eyeball itself or the condition hasn't improved after 72 hours of use of an eye-care OTC product.
Astigmatism is an eye condition in which the cornea is abnormally curved and causes out-of-focus vision. Symptoms of astigmatism may include eye strain, squinting, eye fatigue, and headaches. Most astigmatism arises within the cornea although some forms occur in the lens. Astigmatism is diagnosed via a complete eye exam. Some cases of astigmatism can be treated with corrective eyewear. Astigmatism can also be treated with LASIK surgery.
Eyeglasses, Sunglasses, and Magnifying Glasses
Nonprescription eyeglasses are available over the counter (OTC) and are typically used by people who can no longer read fine print. OTC trifocals are helpful for those who require multiple distances or focal lengths for near and intermediate tasks. OTC sunglasses should offer 100% protection from the sun's UVA and UVB rays. OTC magnifying glasses are useful for viewing tiny objects or fine print.
Keratoconus is a condition in which the cornea bulges outward like a cone. The cause of the condition is unknown, but genetics may play a role. Changes in the shape of the cornea make it difficult for the eyes to focus. Keratoconus is diagnosed by having an eye exam. Treatment involves wearing glasses or contact lenses.
Astigmatism and Your Eyes
Astigmatism is a common eye condition that's easily corrected by eyeglasses, contact lenses, or surgery. Symptoms of astigmatism are headaches, fatigue, eyestrain and blurred vision.
Local ResourcesFind a local Eye Doctor in your town
Treatment & Diagnosis
Medications & Supplements
Prevention & Wellness
- Contact Lenses May Harbor Serious, Blinding Infection
- Scientists Create First 3D-Printer Corneas
- Health Tip: Recognize Signs of Corneal Abrasion
- Cornea Transplants Riskier for Women When They Come From Men?
- Health Tip: Protect Your Eyes From Corneal Abrasion
- Cornea Research Reveals Unseen Layer
- Eye Condition May Alter Corneal Transplant Results
- Corneal Transplant Not Hurt by Long Preservation Time
- Cornea Transplants: Older Donors OK
- Corneal Transplants Can Carry Infection Risk
Eye Health Resources
Health Solutions From Our Sponsors
Subscribe to MedicineNet's General Health Newsletter