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!

Are you losing your sight day by day? Does it make difficult to see you at night? Is this the onset of Blindness? Get to know about Retinitis Pigmentosa with these tips.

What actually is Retinitis Pigmentosa? 
Retinitis Pigmentosa (RP) refers to a group of diseases, which causes a slow, but progressive vision loss. It is a genetic disorder that affects the ability to respond to light.This inherited disease causes a slow loss of vision, beginning with decreased night vision and loss of peripheral (side) vision and eventually results in blindness.

Causes:
Retinitis pigmentosa is often hereditary (runs in families). If you or your partner has retinitis pigmentosa, there may be up to a 50 percent chance that you will pass it on to your children. Ask your ophthalmologist about genetic counseling if you are planning to have children.

Symptoms:
1. Slow loss of vision
2. Beginning of decreased night vision
3. Loss of peripheral vision
4. Difficulty in identifying colours

Diagnosis:
If you have poor night vision or a loss of side vision or if there is a history of retinitis pigmentosa in your family, your ophthalmologist will conduct a comprehensive eye exam to determine if you have retinitis pigmentosa. Your ophthalmologist will dilate your eyes to look at the back of them for signs of disease.

Treatment:
Currently there is no known cure for retinitis pigmentosa. However, research has shown that vitamin A palmitate may slow the progression of certain forms of RP. Your ophthalmologist can advise you about the risks and benefits of vitamin A palmitate and how much you can safely take. Taking too much vitamin A palmitate can be toxic, and evidence of vitamin A palmitate effect on RP progression is not substantial.
Another recommendation for slowing vision loss from RP is to wear sunglasses to protect your retina from harmful ultraviolet (UV) light.

Retinal prosthesis is also an important area of exploration because the prosthesis, a man-made device intended to replace a damaged body part, can be designed to take over the function of the lost photoreceptors by electrically stimulating the remaining healthy cells of the retina.

Retinitis Pigmentosa: What You Should Know About It?

Styes are normally caused by a proliferation of natural bacterial flora within the eye. This causes an inflammatory reaction and is known to affect children more than adults. It resembles a pimple in exterior appearance and may grow both inside and outside of the eyelid. The symptoms of styes include redness, pain, swelling and tenderness. Though the styes do not lead to any kind of visual problems, they can cause significant discomfort.

What can cause styes?
Your eyelids have lots of tiny oil glands, which can become clogged by dead skin, dirt, or oil buildup. When a gland is blocked, bacteria can grow inside. This is what causes a stye to develop.

What are the symptoms of styes?
The most common symptom of styes includes swelling of the eyelid, redness, pain, tenderness, eyelid crusts and burning in the eye. It frequently leads to a yellowish-white discharge which becomes very uncomfortable and may also continue to drain out of the eye. Doctors recommend not to press or squeeze the styes as it may lead to further complications.

You should call your doctor if:

The child`s eye is swollen shut
He has a severe pain
He has a high-grade fever
Swelling lasts for more than 20 days
Pus continues to drain from the eye
His eyelid bleeds
He has problems with his vision
Homeopathic medicines for sty are safe and effective with no side effects. They play a vital role in improving the health and immune levels of the body. The recurrence of any symptoms in a body can be prevented by homeopathic medicines. These medicines are easy and comfortable for all age groups as they taste sweeter and give quicker results.

Styes tend to dry out on its own although applying homeopathic medication can aid in hastening the process of healing.

Amalki: This homeopathic medicine aids in repairing damaged tissue which in turn aids the stye infection to dry out. It is recommended to add a teaspoon of Amalki, which is available in most homeopathic outlets, into a glass of pure water. Then the mixture must be left on its own for the whole night for at least 10 to 12 hours. The mixture should then be filtered and used for washing the affected eye.
Heper Sulphur: Heper sulphur aids in speeding up the rupture of styes so that the pain is instantly relieved. This remedy is particularly suited for the styes that cause significantly red and swollen. It also aids in reducing the tenderness and swelling. In the case of some children, styes tend to secrete a liquid discharge and are extremely painful. Heper sulphur along with warm compress can be extremely helpful in relieving the pain. 
Pulsatilla: Some styes do not cause any pain but cause significant swelling and secrete a yellowish discharge. People affected with such type of styes can be significantly benefited by the use of homeopathic remedy called pulsatilla. It has also been found useful in preventing reoccurrence of styes.
Staphisagria: Staphisagria is for chronic or recurrent styes that appear mainly on the upper eyelid. The eyes are very dry and have rheum. The corner of the eye and the edges of the eyelids may be chapped and infected.
It is important to keep the eye clean and flush it with cold water. If the pain and related symptoms do not go away after 3 to 4 days, it is best to consult a doctor for further treatments.

Styes - How Homeopathic Remedies Can Help?

An inflammation resulting in the formation of a thin layer inside the eyelids or the white part of the eyeball is known as pink eye or conjunctivitis. This condition turns the eye ball into pinkish color, hence the name. Based on the severity of the infection, either one or both eyes get affected.

What are the common symptoms?

Medium to heavy swelling of the eye
Eye crusting after sleep
A burning sensation
Irritation, itching or blurred vision
Redness and increased sensitivity of the eye
Different kinds of conjunctivitis:

Allergic Conjunctivitis: This is the type of conjunctivitis that results from eye irritants such as animal dander, dust particles and pollen. This is not infectious in nature. Treatment prescribed by ophthalmologist includes eye drops and non-steroidal medications. It is advised to keep the eye moist till it gets cured.
Viral Conjunctivitis: As the name suggests, this kind of conjunctivitis is caused due to a viral attack. Sadly though, antibiotics don t work and there is no particular medication for this type of conjunctivitis. Like common cold, viral conjunctivitis runs its course in a span of 1-2 weeks. Since virus is contagious, it is necessary to ensure that the microbes don t spread. Some common prevention measures are listed below:
Eye cosmetics should be abandoned till the conjunctivitis is cured
Hands should be frequently cleaned
Hand and eyes should not be in contact
Frequent change of pillow covers, towels and clothes
Swimming should be completely avoided
Spectacles in place of lens should be used until advised otherwise by a medical practitioner
Bacterial Conjunctivitis: This kind of conjunctivitis is caused by the streptococcal bacteria and has potential to cause real damage if proper medication is not taken on time. This is highly contagious. Prescription often includes antibiotic drop and ointments. The medication is prescribed for 2-3 weeks depending on the level of bacterial spread in the eye. It is very essential to complete the full course of medication to avoid recurrence. Prevention measures as stated above should be strictly followed.
Chemical conjunctivitis: Eye irritants such as chlorine cause this conjunctivitis. Frequent swimmers often get affected by this type of eye infection. Topical steroids are prescribed to cure this kind of infection. Immediate medical attention is required to avoid lasting injury to the eye.
How to prevent pink eye?
While prevention is the best way to refrain from conjunctivitis, some basic hygiene checks are very important. Here is a list of must do s:

Do not share personal items such as combs, towels and toiletries.
Stay away from a conjunctivitis infected patient
Using of goggles while swimming
Frequent usage of hand sanitizer and hand wash

Pink Eye - How You Can Prevent It

A red eye is one of the first and most common symptoms of conjunctivitis. Conjunctivitis is the inflammation of the tissue that lies over the white part of the eye and lines the inner side of the eyelid. It is usually the result of a viral infection and can easily spread from one person to another. Conjunctivitis can also be a symptom of STDs like Gonorrhea or Chlamydia. In newborns, conjunctivitis can be vision threatening, while in grownups it is not considered a serious health risk. The symptoms of conjunctivitis differ according to the cause of the infection. 

Some common symptoms of conjunctivitis are:
1. Green or white discharge from the eye
2. Redness of the white part of the eye
3. Inflammation of the eyelid
4. Waking up to crusted yellow discharge
5. Itchiness and burning in the eyes
6. Increased sensitivity to light
7. Blurred vision

An eye examination and testing a sample of the fluid secreted by the eye can be used to diagnose conjunctivitis.  It can easily be treated at home and does not require hospitalization. Antibiotics are often given in the form of eye drops and ointments to treat conjunctivitis. These usually need to be applied 3 to 4 times a day for a period of 5 to 6 days. Wash your eyes before putting the eye drops. Once applied, close your eyes and roll the eyeball around to distribute the medicine and keep it from overflowing out of the eye. Wash your hands immediately after applying the eye drops.

Viral conjunctivitis is highly contagious. If you are suffering from it, you should take a few days off work and restrict your social interactions. Wash your hands frequently as you may unconsciously rub your eyes. This is especially important with regards to meals and finger foods. Also, avoid sharing towels, pillowcases, etc. to minimize the transmission of the disease from one person to another.  

Avoid using makeup while being treated for conjunctivitis. With conjunctivitis, the eye is more sensitive to irritants and thus, a speck of makeup can worsen the situation. Also avoid contacts. If you wear contacts regularly, dispose the current set and start using a fresh set after your doctor gives you a clean chit. 
Artificial tears or non prescription eye drops can also be used to relieve the itchiness and burning in the infected eye. If only one eye had been affected by conjunctivitis, do not use the same eye drop bottle for both eyes.

Managing the Acute Red Eye

Night blindness is also called nyctalopia.It's a type of vision impairment. People with night blindness experience poor vision at night or in dimly lit environments. It is not a disease in itself, but rather a symptom of an underlying problem, usually a retina problem.

What Causes Night Blindness?
A number of eye conditions can cause night blindness, including:
1. Nearsightedness or blurred vision when looking at faraway objects.
2. Cataracts or clouding of the eye's lens.
3. Retinitis pigmentosa, which occurs when dark pigment collects in your retina and creates tunnel vision.
4. Vitamin A Deficiency
5. Zinc Deficiency
6. Dry Eyes
7. Diabetes

Are the Symptoms of Night Blindness?
The sole symptom of night blindness is difficulty seeing in the dark. You're more likely to experience night blindness when your eyes transition from a bright environment to an area of low light, such as when you leave a sunny sidewalk to enter a dimly lit restaurant. You're likely to experience poor vision when driving due to the intermittent brightness of headlights and streetlights on the road.

How can I Prevent Night Blindness?
You can't prevent night blindness that's the result of birth defects or genetic conditions, such as Usher syndrome. You can, however, properly monitor your blood sugar level and eat a balanced diet to make night blindness less likely. 

Orange colored foods are excellent sources of vitamin A, including:
1. Cantaloupes
2. Sweet potatoes
3. Carrots
4. Pumpkins
5. Butternut squash
6. Mangoes

What are the Treatment Options for Night Blindness?
The treatment will depend on its causes.
1. Nutrient deficiency (Vitamin A and Zinc) is the easiest to treat. 
2. If the cause is cataract, you can go for cataract surgery to remove the clouded lens and replace it with artificial intraocular lens. Vision is usually dramatically improved after surgery. 
3. For dry eye syndrome, lubricate your eyes with artificial tear drops as they provide instant relief. Just make sure that they are without preservatives. 
4. Diabetic retinopathy can be prevented with tight control over blood sugar, active lifestyle and good dietary habits.
5. As for retinitis pigmentosa, unfortunately there are no treatments available. Thankfully, new research is showing that vitamin A might have a slowing effect on the progression of this eye disease.

Night Blindness: Causes and Symptoms

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