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
:
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
:
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
Answer:
I think it 3- 7 days per week
Explanation:
What your brain says about the object's distance is Nothing - this is a visual pattern recognition test, not distance. The size of the object and the distance it is from the observer determine the size of the image that forms on the retina.
- Nothing - this is a visual pattern recognition test, not distance.
<h3>How does the image arrive on the retina?</h3>
After the pupil, the image reaches the lens and is focused on the retina. The eye's lens produces an inverted image, and the brain converts it to the correct position. In the retina, more than one hundred million photoreceptor cells transform light waves into electrochemical impulses, which are decoded by the brain.
With this information, we can conclude that The size of the object and the distance it is from the observer determine the size of the image that forms on the retina.
Learn more about retina in brainly.com/question/13993307
#SPJ1
the client has Glucose-6-phosphate dehydrogenase deficiency
<h3>What is
deficiency?</h3>
when you don't have a topic. If you have a general secondary, pre-university, or vocational secondary education diploma and wish to enrol in a degree programme, but your subjects or subject combinations prevent you from applying directly, what are your options? If so, you allegedly have one or more "subject deficits."
when you don't have a topic. If you have a general secondary, pre-university, or vocational secondary education diploma and wish to enrol in a degree programme, but your subjects or subject combinations prevent you from applying directly, what are your options? If so, you allegedly have one or more "subject deficits."
The following actions can be taken to prevent deficiency conditions: -Consume quick, wholesome meals like groundnuts, soybeans, lentils, etc. -Prolonged cooking and the loss of nutritional value
To know more about deficiency follow the link:
brainly.com/question/25712223
#SPJ4
