Blindness can be partial or total.
Blindness is the deprivation of sight . We can speak of partial blindness (when the person has poor vision or distinguishes lights and shadows) or total blindness (the subject sees absolutely nothing and cannot distinguish any light).
A person can suffer blindness from birth due to genetic problems . Another possibility is that you develop blindness from certain diseases such as glaucoma and cataracts. Malnutrition , chemical poisoning (for example, methanol), and accidents can also cause blindness.
Various causes of blindness
Likewise, other possible causes that may cause a person to suffer blindness are retinitis pigmentosa , the tumor known as retinoblastoma , obstruction of blood vessels, retrolenticular fibroplasia , optic neuritis and also known as lazy eye This last cause can be said to be defined by being that disease that results in the loss of vision in one eye to be able to see details.
The aforementioned is the most frequent cause of blindness among the child population and it originates from the fact that during childhood the communication between the eye and the brain does not develop properly.
It is important to keep in mind that blindness can originate in different parts of the body. Glaucoma and diabetes affect the optic nerve , while old age and retinitis pigmentosa cause damage to the retina . Cortical blindness , on the other hand, is caused by brain damage.
The causes of blindness are varied and can be located in different parts of the body.
Symptoms and possible reversal
Among the most common symptoms that can tell us that something is not right, that we are losing sight and that this can lead to blindness are difficulty focusing on objects, seeing spots, red eyes, sudden cloudy or blurred vision . , experiencing flashes of blackheads or sudden pain in the eyes.
People who suffer from blindness have different tools and mechanisms that allow them to improve their quality of life. The Braille alphabet is a tactile reading and writing system designed for the blind. Guide or guide dogs and canes also help when moving.
In this sense, we would have to highlight the existence of institutions that significantly help those who face the loss of the primary sense of sight. Among those I would highlight the Braille Institute .
Certain types of blindness can be reversed with transplants or, at least, attenuated with the use of lenses . Specialists are confident that, in the future, the use of stem cells will make it possible to cure any type of blindness.
Other uses of the term blindness
All of this without forgetting that there is also what is known as verbal blindness , also called alexia . It is a disease that causes the patient to be unable to read and all of this as a result of an injury suffered in the brain .
In another sense, blindness is called hallucination or a state of mind that obfuscates reason : "I didn't know what I was doing, I was blinded by jealousy and I did something crazy."