pyramidal cataract - ορισμός. Τι είναι το pyramidal cataract
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Τι (ποιος) είναι pyramidal cataract - ορισμός

CLOUDING OF THE LENS INSIDE THE EYE, WHICH LEADS TO LOW VISION
Cataracts; Cateract; Anterior subcapsular cataract; Cataract induction; Nuclear cataract; Cateracts; Senile cataract; Traumatic cataract; Juvenile cataract; Nuclear sclerotic cataract; Brunescent cataract
  • A South African woman experiences newfound eyesight after a patch was removed after surgery to remove an eye cataract.
  • [[Slit lamp]] photo of anterior capsular opacification visible a few months after implantation of intraocular lens, magnified view
  • Cataract surgery, using a temporal-approach phacoemulsification probe (in right hand) and "chopper" (in left hand) being done under operating microscope at a navy medical center
  • Bilateral cataracts in an infant due to [[congenital rubella syndrome]]
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  • Christmas tree cataract (diffuse illumination)
  • Ultrasound scan of a unilateral cataract seen in a fetus at twenty weeks of pregnancy
  • Cross-sectional view, showing the position of the human lens
  • [[Slit lamp]] photo of posterior capsular opacification visible a few months after implantation of intraocular lens, seen on retroillumination
  • Post traumatic rosette cataract of a 60-year-old male
  • Sunflower cataract of a forty-year-old male with Wilson's disease and decompensated chronic liver disease

Pyramidal cell         
PROJECTION NEURONS IN THE CEREBRAL CORTEX AND HIPPOCAMPUS
Pyramidal neuron; Pyramidal cells; Pyramidal neurons; Pyramidal neruron; Hippocampal pyramidal cell; Pyrimidal neuron; Pyramidic cell; Pyramidic cells
Pyramidal cells, or pyramidal neurons, are a type of multipolar neuron found in areas of the brain including the cerebral cortex, the hippocampus, and the amygdala. Pyramidal neurons are the primary excitation units of the mammalian prefrontal cortex and the corticospinal tract.
Pyramidal process of palatine bone         
Pyramidal process of the palatine bone; Pyramidal process; Processus pyramidalis ossis palatini; Pyramidal processes of the palatine bones; Pyramidal processes of palatine bones; Pyramidal processes
The pyramidal process of the palatine bone projects backward and lateralward from the junction of the horizontal and vertical parts, and is received into the angular interval between the lower extremities of the pterygoid plates.
Zonular cataract and nystagmus         
CATARACT THAT HAS MATERIAL BASIS IN MUTATION IN THE NHS GENE ON CHROMOSOME XP22
Nystagmus with congenital zonular cataract
Zonular cataract and nystagmus, also referred as nystagmus with congenital zonular cataract, is a rare congenital disease associated with Nystagmus and zonular cataract of the eye.

Βικιπαίδεια

Cataract

A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision. Cataracts often develop slowly and can affect one or both eyes. Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing at night. This may result in trouble driving, reading, or recognizing faces. Poor vision caused by cataracts may also result in an increased risk of falling and depression. Cataracts cause 51% of all cases of blindness and 33% of visual impairment worldwide.

Cataracts are most commonly due to aging but may also occur due to trauma or radiation exposure, be present from birth, or occur following eye surgery for other problems. Risk factors include diabetes, longstanding use of corticosteroid medication, smoking tobacco, prolonged exposure to sunlight, and alcohol. The underlying mechanism involves accumulation of clumps of protein or yellow-brown pigment in the lens that reduces transmission of light to the retina at the back of the eye. Diagnosis is by an eye examination.

Wearing sunglasses and a wide brimmed hat, eating leafy vegetables and fruits, and avoiding smoking may reduce the risk of developing cataracts, or slow down the process. Early on the symptoms may be improved with glasses. If this does not help, surgery to remove the cloudy lens and replace it with an artificial lens is the only effective treatment. Cataract surgery is not readily available in many countries, and surgery is needed only if the cataracts are causing problems and generally results in an improved quality of life.

About 20 million people worldwide are blind due to cataracts. It is the cause of approximately 5% of blindness in the United States and nearly 60% of blindness in parts of Africa and South America. Blindness from cataracts occurs in about 10 to 40 per 100,000 children in the developing world, and 1 to 4 per 100,000 children in the developed world. Cataracts become more common with age. In the United States, cataracts occur in 68% of those over the age of 80 years. Additionally they are more common in women, and less common in Hispanic and Black people.