According to the Free Dictionary, senile nuclear sclerosis describes a type of cataract that is characterized by a gradual hardening of the nucleus of the lens. This type of cataract is usually brown or black in color and usually occurs in both eyes.Know More
According to MedicineNet.com, cataracts are an abnormality of the lens of the eye. Normally clear, the lens focuses the light that enters the eye through the pupil onto the light-sensitive retina, initiating a chemical reaction that allows an image to be perceived by the brain. A lens that contains a cataract becomes increasingly cloudy, distorting the light that reaches the retina, interfering with vision and eventually causing blindness. Cataracts can be corrected surgically; however, because many third world countries lack surgical services, cataracts remain the most common cause of blindness in the world.
MedicineNet.com explains further that most cataracts are associated with aging, explaining the use of the word "senile" in "senile nuclear sclerosis." Over 50 percent of Americans develop cataracts by the age of 80, and 100 percent of the population have them by the age of 95. Senile cataracts occur most often in the central portion of the lens, or the nucleus, while those in younger people generally are found in other parts of the lens. Non-age-related cataracts are called secondary cataracts and have many causes, including diabetes, inflammatory conditions, medications such as corticosteroids, infections and penetrating injuries to the eye.Learn more about Conditions & Diseases
Nuclear sclerosis forms as newly formed lens fibers in the eye push old lens fibers inward. It is the result of the aging process of the lens, and it causes the eyes to appear gray and cloudy.Full Answer >
Aortic sclerosis is the thickening, stiffening or scarring of the aortic valve, and it typically results in a heart murmur, according to WebMD. Because the valve does not narrow, the murmur usually poses no danger, and a person can live years beyond the first sign of this affliction.Full Answer >
Multiple sclerosis, sometimes called muscular sclerosis, refers to a disorder of the immune system wherein healthy body tissues, specifically the myelin coating that protects the nerves, are attacked by an erroneous immune response. Common symptoms that particularly affect the muscles include impaired balance, muscular cramps and difficulty in arm or leg movement, notes the United States National Institutes of Health (NIH).Full Answer >
Cirrhosis of the liver is the late stage of liver disease related to conditions such as hepatitis or chronic alcoholism, according to Mayo Clinic. Cirrhosis is scar tissue formed by the liver and a condition that is permanent. Early discovery and control of the factors leading to cirrhosis limit further damage and the development of a life-threatening condition.Full Answer >