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!

7 Ways To Care For Your Eyes 

Eyes do more than we give them credit for and require more care than what we actually give them mostly. It isn't very difficult to ensure that your eyes are healthy and taken care of.

Here are 7 ways to care for your eyes everyday.

1) Splash water - Always clean your eyes with cold (filtered) water, from time to time. The clean water washes the eyes and keeps them healthy and free of diseases.
2) Don’t look into the sun - Never look into the sunlight directly. In fact, avoid looking at any sort of light that is harsh on the eyes. Direct rays of any kind of bright light can have damaging effect on the retina.
3) Get eyes examined - Have regular eye exams to check for diabetes and high blood pressure, if these health problems already exist in the family.
4) Do not smoke - People who smoke are more risk of having age-related eye problems.
5) Exercise your eyeballs - Roll the eyeballs up and down, and lift and right without moving your position. Repeat this exercise about 5 to 10 times. This helps relax the muscles in your eyes.
6) Distance eyes from screens - If you work on the computer, make sure there is enough distance between the screen and your eyes. Sit at least 22-28 inches away from the screen. The same applies while using smartphones and tablets. Do not view the screen from too close. Viewing the screen from too near as well as from too far; can increase the strain in your eyes.
7) Give them a break - People who work on the computer all day should ensure that they rest their eyes after regular intervals. Look in a long distance every few minutes. 


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7 Ways To Care For Your Eyes Without Making Any Effort

Astigmatism is an eye condition where there is an imperfection in the curvature of the cornea. The cornea and lens are smooth and equally curved in all directions, which helps to focus the light rays to the retina. But if there is an imperfection in the curvature, then you will suffer from a refractive error. Astigmatism is not an eye disease. It is simply a condition where the eye is not able to focus the light. 

Causes: 
Irregular shape of the cornea is the main cause for astigmatism. It might also be caused because of the imperfect shape of the lens. Suffering from astigmatism is very common. You are either born with the condition or you might have developed it after an eye surgery. It is an incorrect concept that watching too much of television or reading without enough light causes astigmatism.

Types: 
There are three different types of astigmatism:
1. Myopic astigmatism: When the principal meridians of the cornea are nearsighted.
2. Hyperopic astigmatism: When the principal meridians of the cornea are farsighted.
3. Mixed astigmatism: When one of the principal meridians is nearsighted and the other is farsighted.

It can also be classified in two other types:
1. Regular astigmatism: When the principal meridians are perpendicular to each other.
2. Irregular astigmatism: When the principal meridians are not perpendicular to each other.

Symptoms: 
Blurry or distorted vision, strain in the eye, eye discomfort, squinting and headaches are a few symptoms of astigmatism

Diagnosis:
If you notice the symptoms stated above, make sure you pay a visit to your ophthalmologist. If you are suffering from astigmatism, your doctor will do an eye test to check how much your eye is able to focus on light. After conducting his tests, he will determine how much power you have and you will have to wear glasses of that power. Apart from the option of wearing glasses or artificial lenses, you can also go for a surgery to correct the condition. LASIK is an option among the many other options of surgeries available.

Diet: 
Eat foods rich in sulphur. Foods like fish, green vegetables, pineapple, garlic, onion, olive oil, etc are rich in sulphur. Hence, eating these will help you battle astigmatism.

All About Astigmatism

Amblyopia is commonly known as'lazy eye. It is a vision development disorder, which affects eyes and the brain during infancy and childhood. It signifies that the eye does not achieve a normal visual acuity even with refractive correction in form of glasses or contact lens. During normal visual development, the eye and brain learns to'see' and develop binocularity, that is the ability to perceive depth (stereoacuity). This occurs in the first 8 to 10 years of life. 

Each eye transmits a clear and identical image from retina to the brain, which fuses the two images into a single image with 3 dimensions (adding depth). When the image is formed on the retina of two eyes is too dissimilar, the brain cannot fuse the two images and suppresses the more blurred image. As a result, the worse eye does not learn to'see' and becomes'lazy. This condition is seen in 1-4% of population.

The common causes for dissimilar images or amblyopia are:
1. Misalignment of the eyes or squint: it is the primary reason for amblyopia is misalignment of the eyes. In case, both your eyes are not aimed in the same direction, the image captured by each eye is different, resulting in diplopia. The brain will see from the dominant eye and suppress image from the other eye. Over a prolonged period of time, the eye dissociates from the visual cortex of the brain.

2. Refractive amblyopia:
A. Unequal refractive error in both eye. When the eye power of both eyes differ by more than 1.5d of spherical equivalent, which results in dissimilar images between the two eyes. As a result, the visual development in restricted in the worse eye.
B. High refractive error or astigmatism in both eyes, since there is a blurred image in both eyes, the normal vision development does not occur in either eyes resulting in bilateral lazy eyes.

3. Cloudiness in visual system or visual deprivation amblyopia: any kind of obstruction or cloudiness in the normal visual axis of the eye tissues can lead to amblyopia. Disorder of any kind, which blocks a clear image from being focused blocks the formation of a clear image on your retina. Commonly due to congenital or developmental cataracts or corneal opacities or prolonged closure of one eye in early childhood (drooping of one eyelid, eyelid swelling, patching of one eye).

Treatment for amblyopia
For treatment of amblyopia, a child must be compelled to utilize his affected, weaker eye. This can be done by correction of causative factor such as, treating refractive error with glasses, surgical correction of misalignment of eyes followed by patching and vision therapy, cataract surgery.

Patching or occlusion of the good eye
This is done to force the brain to pay attention to visual input from the worse eye. This allows nerve connections between affected eye and brain to develop due to, which the eye'learns to see. Eye drops such as atropine are also used for blurring the vision of the good eye. Some form of vision therapy may also be required to train both eyes to see together and develop some degree of depth perception.

To be effective, treatment should be implement as early as possible, within the period of normal visual development best within first 8 years of life. Some visual gain has been seen in selected patients up to age of 14 to 18 years. This also highlights the importance of a comprehensive eye examination as a routine in young children.

About Amblyopia or Lazy Eye

While it's assumed that numerous eye injuries are inflicted at work, just about the same number of them may happen while at home. Luckily, most eye wounds are preventable. Find ways to prevent eye injuries, as the eyes are very sensitive and delicate.
Here is a list of some of the most common eye injuries and tips on how to prevent them:

1. A lot of eye injuries happen from dust particles entering the eyes, causing itching and burning sensation. Protective glasses should be worn when doing any kind of activity in a dusty area with flying particles.

2. Pencils, scissors, forks, knives and all similar sharp objects can cause a serious eye injury. Day to day household items like bungee cords, wire coat hangers, rubber bands and fishhooks are capable of causing eye injuries. You must always remain aware and super conscious while using such objects.

3. While performing activities such as dusting, sweeping or lawn mowing, make sure to protect your 
eyes well as dust is involved.

4. Children are very curious by nature. Thus, all hazardous stuff like fertilizers, acids should be kept away from their reach. These contain harmful chemicals, which may inflict fatal damage to the eyes.

5. Cooking powder and spices like chili powder can cause injury to the eye. Always wash your hands 
after using these items, so that you don't harm the eyes if you by chance rub them with your hands.

6. Precautions should be taken while dealing with heat or boiling water or oil. They may spill and cause damage to the eyes.

7. Secure floor coverings and railings. On the off chance that a kid or elderly man lives in your home, use a safety gate at the top and base of stairs, and consider covering sharp furniture edges and corners with a padding material.

8. While travelling in a car, abrupt jerking or breaks may cause the head to bump and cause injury to the eye. Always put on your seat belt and do not allow children to sit in the front of a car.

9. Many modern toys, which are very attractive have got sharp edges because of their fancy design. Abstain children from playing with these kinds of toys.

10.  Laser pointers, a common fun gadget for children is very harmful and causes permanent damage to the retina. Stay away from laser pointers.

11. Wear eye gear to protect your eyes during sports activities. Also wear goggles during swimming as chlorine in swimming pool water damages the eyes.

Eye injuries may happen out of nowhere. You must always remain alert to avoid eye injuries.

Most Common Eye Injuries That Happen and Prevention Tips

People may suffer from visual impairment even though their eyes are perfectly normal. Such loss of vision may result from neurological impairment.

Vision is the combination of image formation and perception of various attributes of the image by the brain. When the brain is not able to perceive images or various attributes of images, the patient may suffer from neurological impairment of vision. Such impairment owes its origin to the nervous system.

Causes of Visual Impairment:

There are various areas in the brain that process some or the other attribute of the image that has formed on the retina. Occipital cortex, the area situated at the rear side of the brain is a very important site. It is responsible for processing visual stimuli and allowing people to make an idea about shape, distance, movement, color, etc. The severity of loss of vision depends on the extent and location of damage in the brain.

Neurological loss of vision may result from acquired brain injury, difficulties with visual perception, impairment in coordination of the eyes, etc. All these may stem from damage areas in the brain that are responsible for vision. There are many areas in the brain that are responsible for vision.

These areas can get damaged from various accidents like:

Stroke: If a person suffers a stroke, a part of his or her brain is likely to get damaged due to a haemorrhage or a blocked blood vessel.

Traumatic Brain Injury: A traumatic brain injury such as in a car accident or a violent fall can damage visual perception of the brain.

Infections: Infections such as meningitis attack the brain and may impair various areas of it.

Lack of Oxygen: People may suffer from lack of oxygen if they experience accidents like a near-drowning episode or a heart attack or something else, which has the effect of interrupting blood flow to the brain.

Diseases: Diseases such as brain tumors, multiple sclerosis etc. can precipitate neurological vision loss.

Symptoms of Visual Impairment:

Symptoms of neurological vision loss depend on the type of vision impairment and the location of damage in the brain. It may include:

Blurry vision: In Blurry vision, a person will not see things clearly or may see something in light but find it difficult to see them in dim light.

Double vision: In double vision, the patient sees a single object as two and cannot merge them as one.

Problems with depth perception of objects

Problem with bright light: In this type of problem, a person experiences difficulty seeing an object in a bright light. One may also feel pain or discomfort in the eye in bright light.

Difficulty with interpreting the object the person is looking at

Partial loss in the visual field: In this problem, half of the visual field in each eye is missing.

Treatment of Visual Impairment:

There is hardly any treatment for such vision loss since the rectification of visual acuity is of no help. Depending on the location and degree of neurological impairment, vision may improve over time. Some children with acquired brain injury or impairment in the coordination of the eyes and difficulties with visual perception also tend to improve with age.

Conclusion:

This is a type of vision loss where glasses, contact lenses, surgeries, or eye drops are not going to help. Such vision loss is usually permanent. Children with similar symptoms need to be presented with pictures, bright light, etc., which may help to form an idea about the object.

Visual Impairment Related To Nervous System!

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