Daltonism
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  Daltonism



Daltonism

   Colorblindness of the red-green type (also known as deuteranopia or deuteranomaly).

RELATED TERMS
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Colorblindness
The inability to perceive colors in a normal fashion. The most common forms of colorblindness are inherited as sex-linked (X-linked) recessive traits. Females are carriers and males are affected. As a result, approximately 1 in 8 males is colorblind as compared to less than 1 in 100 females.

Deuteranopia
Colorblindness of the red-green type, also known as deuteranomaly or Daltonism.



SIMILAR TERMS
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Dalteparin
A low-molecular-weight fragment of heparin, prepared by nitrous acid depolymerization of porcine mucosal heparin. The mean molecular weight is 4000-6000 daltons. It is used therapeutically as an antithrombotic agent. (From Merck Index, 11th ed)

Dalteparin Sodium
A low-molecular-weight fragment of heparin, prepared by nitrous acid depolymerization of porcine mucosal heparin. The mean molecular weight is 4000-6000 daltons. It is used therapeutically as an antithrombotic agent. (From Merck Index, 11th ed)



PREVIOUS AND NEXT TERMS
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Dacryocyst
The lacrimal sac; tear sac. The dilated (widened) upper end of the nasolacrimal duct, the passageway that permits tears to drain into the nasal cavity.

Dacryocystorhinostomy
The surgical creation of a passage between the lacrimal sac (tear sac) and the nasal cavity to permit the drainage of tears. Dacryocystorhinostomy may be done to remedy an obstructed nasolacrimal duct.

Dactyl, dactyl
Prefix or suffix denoting involvement of the digits (fingers or toes).

Dactyledema
Swelling of the fingers or toes.

Daily Value
DV, a term on food labels based on the RDA (Recommended Dietary Allowance) designed to help consumers use food label information to plan a healthy diet. The Daily Value serves as a basis for declaring on the label the percent of the DV for each nutrient that a serving of the food provides. For example, the Daily Value for fat, based on a 2,000-calorie diet, is 65 grams (g). A food that has 13 g of fat per serving would state on the label that the "percent Daily Value" for fat is 20 percent.

Daltonism

Dander
Tiny scales shed from human or animal skin or hair. Dander floats in the air, settles on surfaces and makes up much household dust. Cat dander is a classic cause of allergic reactions.

Dandy fever
An acute mosquito- borne viral illness of sudden onset that usually follows a benign course with headache, fever, prostration, severe joint and muscle pain, swollen glands (lymphadenopathy) and rash.

Danlos syndrome
Better known today as Ehlers-Danlos syndrome (EDS), this is an inherited disorder with easy bruising, joint hypermobility (loose joints), skin laxity, and weakness of tissues. There are a number of different Ehlers-Danlos syndromes which share these features but can be categorized into nine different types.

Danon disease
A genetic disorder characterized by heart problems, mental retardation and muscle weakness that affects males who usually die of cardiac arrhythmia or heart failure at around the age of 30. The disease is due to a deficiency of LAMP-2 (which stands for lysosome-associated membrane protein 2.)

Darier disease
A genetic skin disease characterized by slowly progressive hardening of the skin (keratoses) around the hair follicles. This disorder is inherited in an autosomal dominant manner and is due to mutation in a gene called ATP2A2 on chromosome 12. Also known as keratosis follicularis.

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