Amblyopia is decreased vision in one or both eyes due to abnormal development of vision in infancy or childhood.It is commonly known as lazy eye, in which a child's vision does not develop properly, usually in one eye. If it is left untreated, a child's vision will never develop correctly in the affected eye.

What are the types of Amblyopia are there?
There are several different types and causes of Amblyopia, such as Strabismic Amblyopia, Deprivation Amblyopia and Refractive Amblyopia.
The end result of all forms of Amblyopia is reduced vision in the affected eye(eyes).

How does Lazy Eye occurs?
Lazy eye occurs when your brain favors one eye, often due to poor vision in your other eye. Eventually, your brain might ignore signals from your weak or lazy eye. The condition can result in vision impairment and loss of depth perception.

What are the Symptoms of Lazy Eye?
Lazy eye may be hard to detect until it becomes severe. Early warning signs include:
1. Tendency to bump into objects on one side
2. An eye that wanders inward or outward
3. Eyes that appear not to work together
4. Poor depth perception
5. Double vision
6. Squinting

What Causes Lazy Eye?
A number of conditions and factors can lead you to rely on one eye more than the other. These include:
1. Constant strabismus or turning of one eye
2. Genetics or a family history of lazy eye
3. Different levels of vision in each of your eyes
4. Damage to one of your eyes from trauma
5. Drooping eyelids
6. Vitamin A deficiency
7. Corneal ulcer or scar
8. Eye surgery
9. Vision impairment, such as nearsightedness, farsightedness, or astigmatism
10. Glaucoma, which is high pressure in your eye that can lead to vision problems and blindness

How is Amblyopia diagnosed?
When it first occurs, parents and children often don't notice the condition. It's important to get routine eye exams as an infant and child, even if you show no outward symptoms of eye problems.
Family history of amblyopia is a risk factor for the condition.

How Is Lazy Eye Treated?
Glasses/Contact Lenses
Eye Patch
Eye Drops
Surgery
Other treatments include:
Atropine penalization therapy (also used for maintenance)
Optical blurring through contact lenses or elevated bifocal segments

What Is Amblyopia? Are You or Your Child Suffering From It?

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?

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?

Glaucoma is a group of eye diseases characterised by damage to optic nerve usually due to excessively high intra ocular pressure (eye pressure). If left untreated can lead to optic nerve damage resulting in progressive, permanent vision loss. Glaucoma usually affects people above the age of 40, but can affect younger people as well. This condition causes fluid to build up in the eye, which puts pressure on the optic nerve. 

There are broadly two types of glaucoma - Open angle glaucoma ( more common in elderly) and angle closure glaucoma.
Women are more likely to suffer from glaucoma than men are. Ethnicity also plays an important role in determining the risk of suffering from this condition. East Asian and African Americans have a high risk of glaucoma, as they have a shallow, anterior chamber depth. Some of the other conditions that can increase a person s risk of glaucoma are:

Diabetes
Hypothyroidism
Myopia
An earlier eye surgery
Retinal detachment
Tumours
Injury to the eye
Long term corticosteroid medication
If diagnosed early enough, glaucoma can be treated and its effects can be reduced. However, the damage already caused by glaucoma cannot be reversed. The aim of glaucoma treatment is to either reduce the production of fluid in the eye or improve its flow. This helps slow down the progression of this disease and prevents any further loss of vision. Glaucoma treatment usually takes the form of eye drops or surgery.

Eye drops are the first step towards treating glaucoma. There are many different types of eye drops. Prostaglandin analogues aim at increasing the flow of fluid out of the eye and are usually prescribed in cases of swelling around the rim of the eyes, darkening of the iris and blurred vision. Beta-blockers can also help lower the secretion of fluids in the eye.

Patients who are also suffering from diabetes or lung conditions such as bronchitis may be prescribed cholinergic agents, carbonic anhydrase inhibitors or sympathomimetic drugs. Cholinergic agents help improve the outward flow of fluid in the eyes while Carbonic anhydrase inhibitors reduce fluid production in the eyes. Sympathomimetic drugs do both reduce the production of fluids and improve outflow.

If the eye drops are not effective, surgery may be advised to lower the pressure built up in the eye. Some of the common types of surgery for glaucoma are:

Trabeculoplasty: This procedure involves directing a high-energy laser beam into the eye to open clogged drainage canals. The surgery has high success rates but the problem may recur after surgery.
Filtering surgery: This involves creating an opening in the eye and removing a part of the trabecular meshwork, thus allowing fluid to flow outwards.
Drainage implants: Children or patients with secondary glaucoma may be treated with this surgery where a small silicone tube is placed in the eye to aid in fluid drainage.

Glaucoma - Factors That Put You Risk!

Bloodshot eyes aren't exactly the best feature of a person! When a person's eyes are bloodshot, it is quite easy to 'see' that something is wrong! Eyes are possibly the most delicate organs of the body, and are all the more vulnerable to infections such as 'subconjunctival haemorrhage'. However, as dour as such terms may sound, there is a lot which really should be known about them!

The eye has a thin layer which goes by the name of the conjunctiva, which covers a part called the sclera. Many a times, especially in the case of children, if an injury unfortunately occurs in the eye, there are chances that it may form subconjunctival haemorrhage.

The reason why this occurs is that there are some of the very small blood vessels in a person's eye break. The reason for this, apart from an injury could also be on account of a sudden increase in the blood pressure of the person. This usually takes place due to some very strenuous lifting exercise but also can occur due to laughing or sneezing!

The occurrence of a subconjunctival haemorrhage can also be closely linked to the consumption of pills which thin the blood such as aspirin.

Treating Subconjunctival Haemorrhage

Now, considering the fact that such a haemorrhage has the potential to look quite scary, it may be natural for a person to react proactively. However, in many cases this is not required at all. As a matter of fact, the issue clears up within a couple of weeks at the maximum and a week and a half, on average. If this does not happen to be the case, it is a signal that a medical professional should take a look at the patient's eye.

In many instances, a person may not even get to know that he or she is suffering from a subconjunctival haemorrhage as there is no effect on the vision of the person and he or she would probably get to know that this is the case by taking a look in the mirror or being informed of his or her eye looking red.

In order to treat a subconjunctival haemorrhage in an effective manner, the first thing to be done by a person is to avoid any medication which could be causing it. Also, it is quite important not to rub one's eye as this really does slow down the healing process.

Artificial tears help soothe the eye but they do not hasten the rate of repair. A subconjunctival haemorrhage may occur, but if a person follows the right steps, his or her vision can consistently remain 20/20!

All About Subconjunctival Haemorrhage

There are many common measures people take to improve their eyesight or to improve their vision, including wearing glasses, lenses, and many more. Here are some effective exercises, which can prove to be highly beneficial to improve your eye health:

1. Stretching
This is the most common and also one of the easiest to do. It requires you to just look up, hold for two seconds, look down, hold for two seconds and then repeat this procedure for each corner of your eye, which means top-left, top-right, bottom-left and bottom-right corners.

2. Flexing
This is simply rotating your eyes in circles. Roll your eyes in the clockwise direction for one minute and then roll your eyes in the anticlockwise direction for one minute.

3. Focus switching
This particular eye exercise is probably the most useful one to improve eye health. In this eye exercise, you have to hold something at a reading distance and cover the other eye. You then have to find something that is at least twenty feet away and trace its shape with one eye closed. With one eye closed, trace more shapes, which are twenty feet away.

4. Palming
This exercise is also very simple to perform. All you have to do is cover your eyes with your palms. Once you have done this, just wait and see that there are no bright flashes of light. If you see that there is a bright flash of light, just wait till they go. This is used primarily to distress the eyes.

5. Deep blinking
This is also an incredibly useful exercise for distance vision. What you have to do is to place some large letters are at a fair distance and then sit on a chair. You have to then close your eyes and tighten all your muscles for 5 seconds. After 5 seconds are over, you have to open your eyes and then you have to see the letters for a second or two. The more number of times you do this, the more clearly you will be able to see the letters after reopening your eyes.

However, these eye exercises are not universally accepted by all doctors.

Exercises to Improve Eye Health

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