I need some health questions answered!?
urmomsmell
Can you please answer as many of these questions as you know keeping it truthful and scientific please. THANKS!
* Why do some people need glasses? How do glasses improve vision?
* What causes nearsightedness? How is it different from farsightedness?
* How does corrective laser eye surgery work? How does it improve vision? What risks are involved?
* Why are some people colorblind?
* How do optical illusions work? How do they âfoolâ your brain?
* How do red-and-blue â3D glassesâ work?
* How do sounds reach the brain?
* Why do some sounds have a low pitch, while others have a high pitch?
* Why are animals such as dogs able to hear sounds that humans cannot?
* When someone is âhard of hearing,â what are some possible causes?
* Why do certain smells instantly evoke specific memories or feelings?
* How are the senses of smell and taste related?
* If you hold your nose while eating, how are tastes affected? Why?
* How do taste buds work? How does the tongue recognize different tastes, such as the bitterness of a lemon or the sweetness of sugar?
* Which taste cannot be detected by the tip of your tongue: bitter, sour, salty, or sweet? Why?
* How does your hand tell the difference between hot and cold surfaces?
* How do blind people use braille to read?
Answer
Refractive errors occur when the eye is not able to correctly focus images on the retina. The result is blurred vision, which is sometimes so severe that it creates functional blindness for affected individuals.
The three most common refractive errors are:
Myopia (nearsightedness) â this is difficulty in seeing distant objects clearly.
Hyperopia also known as Hypermetropia (farsightedness) â this is difficulty is seeing close objects clearly.
Astigmatism - This is distorted vision resulting from an irregularly curved cornea.
For laser surgery or lasik see this site health.howstuffworks.com/lasik3
for colour blindness see this site
en.wikipedia.org/wiki/Color_blindness
optical illusions
http://www.eyetricks.com/illusions.htm
How 3d glass works
http://science.howstuffworks.com/3-d-glasses.htm
how sound reaches the brain
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1044837
low and high pitch of sound
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/sound/u11l2a.html
Sounds that humans cant hear and why
http://omp.gso.uri.edu/dosits/science/measurng/3.htm
Hearing loss
Types of Hearing Loss
There are a few different types of hearing loss: conductive, sensory, mixed (conductive and sensory combined), and neural.
Conductive (say: kun-duk-tiv) hearing loss. This happens when there is a problem with a part of the outer or middle ear. Most kids with conductive hearing loss have a mild hearing loss and it is usually temporary because in most cases medical treatment can help.
Sensory (say: sen-suh-ree) hearing loss. This happens when the cochlea is not working correctly because the tiny hair cells are damaged or destroyed. Depending on the loss, a kid may be able to hear most sounds (although they would be muffled); may be able to hear in quiet but not in noise; only some sounds; or no sounds at all. Sensory hearing impairment is almost always permanent and a kid's ability to talk normally may be affected.
Neural (say: nur-ul) hearing loss. This happens when there is a problem with the connection from the cochlea to the brain. Neural means related to nerve, so neural hearing loss means the nerve that carries the messages from the cochlea to the brain is damaged.
What Causes Hearing Loss?
Hearing loss can happen because a person was born with parts of the ear that didn't form correctly and don't work well. Other problems can happen later because of an injury or illness, including:
middle ear fluid
serious infections, such as meningitis
head injury
listening to very loud music, especially through headphones
repeated exposure to loud sounds, such as machinery
see this site
kidshealth.org/kid/health_problems/sight/hearing_impairment.
Nostalgic smells -
http://www.bbc.co.uk/science/humanbody/mind/articles/intelligenceandmemory/nostalgicsmells.shtml
Relation of smell and taste
http://serendip.brynmawr.edu/exchange/node/1575
How taste buds work
http://www.wisegeek.com/how-do-taste-buds-work.htm
Tip of tongue and taste recognition - this website says that its a myth that there are taste zones onthe tongue
http://www.livescience.com/health/060829_bad_tongue.html
How we sense hot and cold......
http://www.myuniversalfacts.com/2006/06/skin-sense-of-touch-how-we-feel-things.html
Braille how it works
Reading and Writing Braille
People read Braille by moving their fingertips from left to right across the lines of dots. When writing Braille, people move from right to left instead, physically pressing the dots into the paper so that they show up on the other side. There are many methods used to write Braille, including: Physically pressing each dot into paper using a handheld stylus to make the impressions and a slate to hold the paper
A Braille writer, which has one key for each of the six dots in a Braille cell A full QWERTY keyboard attached to a Braille printer
Learning to use these tools and to read Braille is a lot like learning to read and write print. Printed letters and Braille cells are both symbols for pieces of language. The first step is to learn each of these symbols and what they mean. The next is to learn to recognize the patterns that the letters form. This eventually leads to the comprehension of words, sentences and paragraphs.
Hope that will answer all your queries . please post more questions if some thing is left out .
thanks
Geemon
Refractive errors occur when the eye is not able to correctly focus images on the retina. The result is blurred vision, which is sometimes so severe that it creates functional blindness for affected individuals.
The three most common refractive errors are:
Myopia (nearsightedness) â this is difficulty in seeing distant objects clearly.
Hyperopia also known as Hypermetropia (farsightedness) â this is difficulty is seeing close objects clearly.
Astigmatism - This is distorted vision resulting from an irregularly curved cornea.
For laser surgery or lasik see this site health.howstuffworks.com/lasik3
for colour blindness see this site
en.wikipedia.org/wiki/Color_blindness
optical illusions
http://www.eyetricks.com/illusions.htm
How 3d glass works
http://science.howstuffworks.com/3-d-glasses.htm
how sound reaches the brain
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1044837
low and high pitch of sound
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/sound/u11l2a.html
Sounds that humans cant hear and why
http://omp.gso.uri.edu/dosits/science/measurng/3.htm
Hearing loss
Types of Hearing Loss
There are a few different types of hearing loss: conductive, sensory, mixed (conductive and sensory combined), and neural.
Conductive (say: kun-duk-tiv) hearing loss. This happens when there is a problem with a part of the outer or middle ear. Most kids with conductive hearing loss have a mild hearing loss and it is usually temporary because in most cases medical treatment can help.
Sensory (say: sen-suh-ree) hearing loss. This happens when the cochlea is not working correctly because the tiny hair cells are damaged or destroyed. Depending on the loss, a kid may be able to hear most sounds (although they would be muffled); may be able to hear in quiet but not in noise; only some sounds; or no sounds at all. Sensory hearing impairment is almost always permanent and a kid's ability to talk normally may be affected.
Neural (say: nur-ul) hearing loss. This happens when there is a problem with the connection from the cochlea to the brain. Neural means related to nerve, so neural hearing loss means the nerve that carries the messages from the cochlea to the brain is damaged.
What Causes Hearing Loss?
Hearing loss can happen because a person was born with parts of the ear that didn't form correctly and don't work well. Other problems can happen later because of an injury or illness, including:
middle ear fluid
serious infections, such as meningitis
head injury
listening to very loud music, especially through headphones
repeated exposure to loud sounds, such as machinery
see this site
kidshealth.org/kid/health_problems/sight/hearing_impairment.
Nostalgic smells -
http://www.bbc.co.uk/science/humanbody/mind/articles/intelligenceandmemory/nostalgicsmells.shtml
Relation of smell and taste
http://serendip.brynmawr.edu/exchange/node/1575
How taste buds work
http://www.wisegeek.com/how-do-taste-buds-work.htm
Tip of tongue and taste recognition - this website says that its a myth that there are taste zones onthe tongue
http://www.livescience.com/health/060829_bad_tongue.html
How we sense hot and cold......
http://www.myuniversalfacts.com/2006/06/skin-sense-of-touch-how-we-feel-things.html
Braille how it works
Reading and Writing Braille
People read Braille by moving their fingertips from left to right across the lines of dots. When writing Braille, people move from right to left instead, physically pressing the dots into the paper so that they show up on the other side. There are many methods used to write Braille, including: Physically pressing each dot into paper using a handheld stylus to make the impressions and a slate to hold the paper
A Braille writer, which has one key for each of the six dots in a Braille cell A full QWERTY keyboard attached to a Braille printer
Learning to use these tools and to read Braille is a lot like learning to read and write print. Printed letters and Braille cells are both symbols for pieces of language. The first step is to learn each of these symbols and what they mean. The next is to learn to recognize the patterns that the letters form. This eventually leads to the comprehension of words, sentences and paragraphs.
Hope that will answer all your queries . please post more questions if some thing is left out .
thanks
Geemon
I'm legally blind in my left eye - is there anything I can do?
Amy Iacobu
I'm 16 years old, and I have barely been able to see in my left eye since i've been born.
I've never cared all that much about my eye sight, but I tend to have a slight "lazy eye" ( really, when I get tired ) because of it.
I was in Disney, Orlando yesterday for a family reunion. We went as a group to an "amazing mickey 3-D movie". Both sides of the 3-D glasses were black. Even so, I can't see the 3-D. I've never been able to. According to my family it was the best 3-D experience they've seen, and I was pretty dissapointed that i'm unable to experience it.
Jealous, maybe. I'll admit it. Like i've been told , i'm blessed because it could be a lot worse ,
But i'm wondering - Could it be better? Can I get an eye surgery to fix it?
( I've been told by surgeons - i've had two eye surgeries - that lasic/laser eye surgery won't fix it )
Answer
Maybe.....
It really depends what type of strabismus you have in that left eye and it depends on a TON of other factors. And as you have discovered, strabismic folks cannot enjoy 3D movies, unfortunately.
The good news is that there is NO age limit for vision therapy! While yes, the best results occur when you are very young, but studies have shown time and time again that teenagers and adults can get benefit from vision therapy. Whether or not you'll ever be able to see 3D, no one can tell you that.
However, if you are serious about checking this out, I would recommend you find an optometrist (NOT an ophthalmologist .... they only do surgery) in your area that specialized in strabismus and/or binocular vision. I don't know where you are located, but at my optometry school I attend we have an awesome vision therapy department and an awesome staff. Having a complete workup to know what type of strabismus you have, how much vision can be improved in that left eye, and lots of other factors we need to know, can maybe give you a better idea if it is possible for your eye to improve.
Surgery *maybe* will help, but you need to remember that your brain plays a huge role in what you see. Sure, you can have surgery to make your eyes straight, but if your brain doesn't know what to do with the image in your left eye, the surgery is useless to you. So we have to re-train your brain first to "see" with that left eye, and that's what the vision therapy does.
So I can't tell you if your vision in the left eye could be better, or if you are capable of seeing 3D. You'd need to have a full workup like I described above. But it's worth checking it out!
Maybe.....
It really depends what type of strabismus you have in that left eye and it depends on a TON of other factors. And as you have discovered, strabismic folks cannot enjoy 3D movies, unfortunately.
The good news is that there is NO age limit for vision therapy! While yes, the best results occur when you are very young, but studies have shown time and time again that teenagers and adults can get benefit from vision therapy. Whether or not you'll ever be able to see 3D, no one can tell you that.
However, if you are serious about checking this out, I would recommend you find an optometrist (NOT an ophthalmologist .... they only do surgery) in your area that specialized in strabismus and/or binocular vision. I don't know where you are located, but at my optometry school I attend we have an awesome vision therapy department and an awesome staff. Having a complete workup to know what type of strabismus you have, how much vision can be improved in that left eye, and lots of other factors we need to know, can maybe give you a better idea if it is possible for your eye to improve.
Surgery *maybe* will help, but you need to remember that your brain plays a huge role in what you see. Sure, you can have surgery to make your eyes straight, but if your brain doesn't know what to do with the image in your left eye, the surgery is useless to you. So we have to re-train your brain first to "see" with that left eye, and that's what the vision therapy does.
So I can't tell you if your vision in the left eye could be better, or if you are capable of seeing 3D. You'd need to have a full workup like I described above. But it's worth checking it out!
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