Answer:
Common causes of blindness are diabetic neuropathy, glaucoma and cataracts.
Explanation:
Blindness refers to the complete lack of functional vision.It occurs when an inadequate amount of light hits the retina, or the information has not been delivered to the brain correctly.
Complete blindness : characterized by a complete and total loss of vision. Merck Manuals reports that legal blindness is defined as having equal to or worse than a 20/200 visual acuity in the better eye. Having a visual acuity of 20/200 means that someone with normal vision can see an object at 200 feet, and a person with impaired vision can see at a distance no further than 20 feet. Several different diseases can cause complete blindness; some develop later in life and some are present at birth. The leading cause of blindness in the United States is diabetes, according to the National Eye Institute. Diabetes causes diabetic retinopathy, which results in destruction of the retina. Other causes of complete blindness include age-related macular degeneration, which the National Eye Institute calls the most common cause of blindness in adults who are 60 or older; cataracts, which obstructs light from hitting the retina because of opaque patches on a lens; and glaucoma, which causes blindness due to damage to the optic nerve.
Color Blindness
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People who have color blindness, also called dyschromatopsia, are unable to distinguish certain colors. This type of blindness more commonly affects men than women. Merck Manuals reports that the most common form of color blindness is red-green color blindness, which makes it difficult to distinguish certain shades of red and green. Color blindness is almost always present at birth, and is usually caused by the presence of a defective gene on the X chromosome. The reason that more men are affected by color blindness than women is that women have two X chromosomes; thus, even if they are "carriers" of a bad gene, their other X chromosome usually has a functional gene. Because men have only one X chromosome, the presence of one bad gene is sufficient to cause color blindness. Defective retinal cells result in some forms of color blindness; other forms are caused by defects in the optic nerve.
Night Blindness
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Night blindness is vision impairment that occurs at night or when light is dim. It does not generally result in a complete lack of vision but significantly impaired vision. People with night blindness often have difficulty driving at night or seeing stars. Several different factors cause night blindness, according to the University of Maryland Medical Center. These factors include cataracts, birth defects, a vitamin A deficiency, or a retinal disease called retinitis pigmentosa
Peritoneal dialysis and hemodialysis are both used to manage kidney failure. Hemodialysis involves the use of a synthetic membrane called a dialyzer, which filters wastes and removes excess fluid from the blood. Peritoneal dialysis does not use a dialyzer.
<h3>What do you mean by Dialysis?</h3>
Dialysis may be defined as the process of removing blood from an artery, purifying it by dialysis, adding vital substances, and returning it to a vein.
In hemodialysis, your entire blood is circulated outside and it is filtered with the help of an instrument known as a dialyzer. While in peritoneal dialysis, clean blood flows through a tube into the part of the abdomens. The biggest difference in these two dialysis processes is that Hemodialysis requires an artificial kidney machine to filter blood while peritoneal dialysis does not require such kind of arrangement.
Therefore, the difference between hemodialysis and peritoneal dialysis is hemodialysis occurs outside the body while peritoneal dialysis occurs inside the body.
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Answer:
The ovarian cycle is under the regulation of the pituitary gland, because it is responsible for releasing gonadotrophic hormones: Foliculostimulant Hormone (FSH) and Luteinizing Hormone (LH)
The answer is A i believe.
Answer:
The etiology of a disease is its cause or origin. Etiology is also the name for the study of the causes of diseases. It can also refer to the study of the cause of things in other fields, such as philosophy and physics.