10 surprising facts about your eyes

You never tend to pay a lot of attention to your eyes unless they are affected by some serious disorder or unless your vision is disrupted. But did you know that your eyes are capable of doing much more than you can imagine? here are 10 surprising facts about your eyes you didn't know about.

1. How intricate!

Your eyes take more than 2 million working parts to function. No wonder your eyes are the second most complex organ of your body after your brain.

2. A lot depends on them

As much as 80% of your memories are determined by what you see. Also, 80% of what you learn is because of your eyes.

3. Retina and security

The iris of your eyes has approximately 256 unique characteristics, which is more than even your fingerprints. This is the reason why retina scans are used so widely today for security purposes.

4. It's a colourful world

Your eyes can distinguish between approximately 10 million different colours. And women with a particular kind of genetic mutation can see millions of more colours.

5. Upside-down

The retina of your eyes receives the vision of the outside world as upside down. It is your brain, which flips the image for you so that you can see the world as it is.

6. Sunscreen for the eyes?

It is possible for your eyes to get sunburnt. Therefore, it is advisable for you to wear sunglasses in order to protect your eyes from the ultraviolet radiations.

7. Godspeed!

The eye muscle is the muscle that reacts at the fastest rate out of all the other muscles in your body. It can contract in less than even 1/100th of a second.

8. Paint it red?

The retina of your eyes cannot detect the red colour. The retinas do have green, red and blue receptors, but the red receptor can detect only the colour yellow-green and the green one can recognise blue-green. It is your brain that combines these signals to give you the impression of the colour red.

9. Dreams and sight

Even if you become blind later in life, you can see images in your dreams if you were born with sight.

10. We are blink-eyed peas

You blink approximately 17 times every minute. That makes it 5.2 million times in a year.

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Related Tip: Sitting Too Close To TV Will Weaken Your Eyes? FALSE.

Surprise Yourself with these 10 Facts about Your EYES!

Glaucoma is a serious eye condition in which the optic nerve gets damaged and the situation gets worse over time. If untreated, individuals may go permanently blind. Most individuals, with glaucoma, have no previous symptoms or warning signs of this disorder and this is the reason why it is important to have regular eye check-ups.

Causes of glaucoma
Eyes have a liquid called aqueous humor. This fluid flows out of the eyes through mesh like channels for proper lubrication of the eye. However, there can be situations in which these channels may get blocked. In such a case, there would be a build-up of this liquid, thereby causing an increase in fluid pressure. This is usually a major cause of glaucoma. Although there has been no elaborate evidence of what exactly causes this blockage, doctors have noticed that this can be inherited.

Other less common causes include:

Any sort of blunt injury or chemical injury to the eye
Blocking of blood vessels inside the eye
Other inflammatory conditions
Improper eye surgery
Types of glaucoma
There are mainly two kinds of glaucoma than can occur:

Open-angle glaucoma: This is the most common kind of glaucoma and is also called wide-angled glaucoma. In this kind, the tubular meshwork through which the liquid flow occurs is normal. However, the fluid flow isn t the way it should be.
Angle-closure glaucoma: This is also known as acute glaucoma or chronic angle closure. In this case, the liquid is not able to drain properly because of the angle between the iris and the cornea being too narrow, thus causing the iris to be in the way. This can cause a sudden build-up of pressure, thereby leading to chronic glaucoma.
Facts about glaucoma

This disorder usually has no previous signs or symptoms and occurs all of a sudden.
This disorder mainly affects individuals above 40 years of age.
Glaucoma can be inherited.
People with diabetes have chances of suffering from glaucoma.
If not treated early, it may lead to permanent blindness.
Symptoms of glaucoma
Usually there aren t many symptoms to warn people about this disorder. However, one of the first signs is definitely losing peripheral or side vision. Other symptoms might include

Chronic vision loss
Visibility of halo around lights
Narrowed vision
Glaucoma is treated by any of the three methods:

Prescription eye drops in order to reduce eye fluid formation, thereby resulting in outflow increase
Laser surgery
Microsurgery

Glaucoma - A Complete Guide on It!

Eye allergy or allergic conjunctivitis is an adverse immune response of the body that occurs when it comes across an irritating substance or allergens like smoke, dust or pollen. The body assumes these to be harmful substances and releases chemicals called histamine to fight against them.

Symptoms of an eye allergy-

Allergy in the eyes causes the occurrence of certain symptoms-

  Itching in the eyes

  The sensation of burning in the eyes

  Redness

  Watery discharge

  Swollen eyelids

  Light sensitive

What triggers it?

An eye allergy is usually triggered by the following components-

  Pollen

  Dander

  Dust Mites

  Mould

  Pet Dander

  Exhaust from vehicles

What to do if you suffer from eye allergy-

  Consult an eye specialist or allergist - It is important to consult a physician since the symptoms may pertain to other allergies like asthma or eczema that have different treatment.

  Take proper medication - Take the prescribed eye drops, oral histamines or decongestants to alleviate the symptoms.

  Avoid the allergen - It is difficult to do so if the allergies are seasonal, that means if the eye allergies always occur during specific seasons of the year. If they are not seasonal, you can avoid the allergens if you

Keep the doors and windows closed at home and while riding the car
Take a shower or change your clothes after coming back home from outside
Wear an allergy-relief mask while outside to filter the smoke, dust, etc.
Wear glasses to protect eyes from the allergens
Wash hands after petting any animal
Use a dehumidifier to protect against mould
  Take allergy shots - These are good precautionary measures for seasonal allergies. These increase the tolerance for the irritants. Similarly some eyedrops can be given to decrease the frequency, severity and intensity of allergy episodes.

  Natural remedies - If nothing else works you can use a cold compress to relieve the itchy eyes. Eat walnuts, fish oil and flaxseed oil that contain Omega- 3 fatty acids to reduce inflammatory substances in the body.

What not to do if you are having an eye allergy-

  Avoid rubbing your eyes; that will further irritate your eyes and damaged the eye surface

  Do not keep your indoor surroundings dirty and dusty

  Do not dry-sweep the floors

  Do not pet any animal if you are allergic to animal dander

There is no permanent cure for eye allergies yet but the proper treatment and precautions can help to reduce many of the symptoms. Over-the-counter medications may work out for some people but others may require severe treatment. Remember in spite of prophylactic or therapeutic treatment if u are exposed to a high load of allergens, you will develop symptoms of allergies but they will be milder than if u had no prophylaxis.

Eye Allergies - What To Do & What Not To Do?

Glaucoma is a disease that damages your eye's optic nerve. It usually happens when fluid builds up in the front part of your eye. That extra fluid increases the pressure in your eye, damaging the optic nerve.Glaucoma is the second largest cause of eye blindness in the world.

There are several types of Glaucoma:
1. Open-angle Glaucoma
2. Normal-tension Glaucoma
3. Angle-closure Glaucoma
4. Congenital Glaucoma
5. Secondary Glaucoma
6. Glaucoma suspect

How will you know that you are suffering from Glaucoma?
Only half the people with glaucoma are aware that they are suffering from this condition. When Glaucoma develops, there are usually no early symptoms. This is why glaucoma can 'steal' sight gradually.

Symptoms:
1. In its early stages, open-angle Glaucoma has no obvious symptoms. As the disease progresses more blind spots develop in the peripheral (side) view.
2. An attack of angle-closure Glaucoma includes the following:
a. Severe pain in the eye or forehead
b. Redness of the eye
c. Decreased vision or blurred vision
d. Vision rainbows or halos
e. Headache
f. Nausea
g. Vomiting
If you get any of the symptoms rush to your doctor and take an eye exam as soon as possible.

Causes:
1. Eye injury
2. Inflammation of the eye
3. Dilating eye drops
4. Blocked or restricted drainage in your eye
5. Use of steroid-containing medications (pills, eye drops, sprays)
6. Poor or reduced blood flow to your optic nerve
7. High or elevated blood pressure

Who is at Risk for Glaucoma?
People with more risk of developing Glaucoma include people who:
1. Are over age 40
2. Have family members with glaucoma
3. Have high eye pressure
4. Are farsighted or nearsighted
5. Have had an eye injury
6. Have diabetes, migraines, high blood pressure, poor blood circulation or other health problems affecting the whole body.

Types, Causes and Symptoms of Glaucoma

The most common vision problems are shortsightedness and farsightedness. Shortsightedness is when a person sees close objects clearly while distant objects appear blurry. It is more common than farsightedness and affects about 70% of the Asian population.

When there is a refractive issue, the prescription usually has a plus/minus with it and also a number. A  minus  symbol is used to represent shortsightedness; the greater the number of the glasses, the higher the shortsightedness. High myopia is a more severe form of shortsightedness where the power is -6.0 or higher.

Symptoms: 

As mentioned, the person will be able to see nearby objects but will have difficulty seeing far off objects.

Difficulty reading signs and boards
Squinting
Straining to reduce the strain on the eye
Tired and fatigue due to this eye strain, especially when in constant move like playing sports or travelling
How it happens?

Vision can be explained by a physical process where light passes through a lens and falls on the retina in the posterior portion of the eye where it forms an image. This is then sent to the brain where it is read and interpreted as a particular object. When the lens becomes elongated, the image that is formed is distorted in that it is formed in front of the retina and not on the retina. Though it gradually settles down with adulthood, in most cases, it progresses and requires corrective lenses. The corrective lenses ensure the image falls on the retina and visual perception is improved.

Treatment:

Corrective glasses are the most commonly used measure for nearsightedness. The lenses could be used either as spectacles or as contact lenses.
Laser surgery can also be used to correct the problem. A thin layer of the cornea is removed and the image formation is corrected.
Artificial intraocular lenses are also being used to treat this condition. They work like contact lenses and may need periodic replacement.
The most common technique, especially for high myopia is the use of surgery to correct the problem. This is a one-time correction and is a more durable solution than the earlier mentioned options.
Appropriate calculations are done to identify the lens to be used so that proper vision is restored.
Complications: 

Though not common, retinal detachment and variable postoperative refractive error can occur during the surgery.
It is very important to set realistic expectations with the patient in terms of what to expect before, during, and after surgery. If only one eye is going for repair, the chances of mismatch in vision could be present in the early stages. Being clear about what to expect will help in successful correction.

Myopia or Nearsightedness - How It Can Be Treated?

Bloodshot eyes indicate the reddening of the eye vessels. They can cause irritation and make the eye swollen. The condition may arise due to allergies, eye infections, allergies, fatigue and other illness of the eye. It does not signify a disease but indicates an eye condition which might have caused the eye to redden. Bloodshot eyes can be encountered in one or both the eyes.

Causes of Bloodshot Eyes:

One of the frequent causes of bloodshot eyes is irritants such as dry air, pollen, pet dander, dust and UV rays of the sun. Shortage of sleep also tends to make the eyes red. Inflammations of the eye can also make them red giving a bloodshot appearance. It can even happen with people who wear contact lens for more than 16 hours without soaking it in the disinfectant. At times excessive dryness can make the eyes red. Some other reasons for the eye to become red include conjunctivitis, blepharitis, glaucoma and corneal ulcer. Another concerning reason of bloodshot eyes is a subconjunctival haemorrhage. While the latter is not dangerous in nature, it can cause significant trouble if proper care is not taken on time.

Symptoms of Red Eyes:

Some of the common signs of bloodshot eyes include watery eyes, foreign sensation, burning feeling, dermatitis, falling of eye lashes, light sensitivity, swollen eyelid, itching of the eye and feeling of irritation of the eye.

The Complications Involved:

In most of the cases, bloodshot eyes do not imply serious complications. In case it happens from conjunctivitis, a person may not be able to go to work, wear cosmetics and come in public places since it is a communicable disease. If bloodshot eyes arise from a serious condition such as glaucoma and trauma, some of the possible complications may involve the following:

Eye scarring

Vision loss due to complete blindness

Spreading of the existing condition to other persons

Eye loss in severe cases

Preventive Measures:

Bloodshot eyes might arise from an array of reasons. While it cannot be totally dodged, some general preventive measures can ensure that such a condition does not arise:

Keeping hands clean by thoroughly washing them with liquid soap

Not sharing personal belongings such as washcloths, linen, and cosmetics

Get immediate medical attention in case of any eye injuries

Stay away from an environment that is full of allergens

Staying away from people who are suffering from infectious eye diseases such as conjunctivitis

Taking a shower immediately after getting in touch with an infected person suffering from conjunctivitis

Wearing eye glasses in a dusty environment

Bloodshot Eyes - Causes, Symptoms and Complications

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