November 29, 2011

Why people choose Acuvue contact lenses

If a person has eye health problems, and enters a contact lens shop, the first thing this person looks at is the inscription on the box. From a lot of possibilities the choice will probably be Acuvue.

This brand is one of the world’s most known and most respected brands. It can be found in many countries and people like it, because when they are buying a product, they know that they do not have to be worried about the quality.But why do people like these lenses? Acuvue lenses are soft lenses, providing a good fit on the eye, and they are very comfortable. They are not designed for longer use, but in short term, they are the perfect contacts to choose.

For example if you want to buy daily contacts, the best choice would be the 1-Day Acuvue or Moist disposable lenses. These lenses are the best way to start a day. Every day pair of clean, good quality lenses makes your morning full with sunshine. And they are also cheap. What else would anybody need?

The most commonly used lenses are the simple Acuvue lenses and the Acuvue 2 lenses. These lenses contain and are made of gas permeable material. They are also from soft material, so they give you the best fit and because they are replaced frequently, mostly every week, they are healthier than many other lenses. These are older lenses, but still very popular.

When word comes about colors, Acuvue brand brings probably the best. The Acuvue 2 Colors Enhancers and the Acuvue 2 Colors Opaque lenses bring many colors to fit with anybodies needs. There is aquamarine, ocean blue, and emerald green to enhance light eyes, and another seven colors for change any kind of eye color.

If you have a dry eye, the contact lenses you need are the Acuvue Advance lenses. These lenses are with Hydraclear. This means that the surface of the lens is covered with a moisture rich element that gives a unique feel for the wearer. 

There are some people, who do not see near, but close neither. For them the solution is the Acuvue Bifocal contact lens. These lenses contain two parts. The interior is for near vision, and the exterior for far vision. They possess all the qualities of the other lenses, so they are your friends, if you have bad eyes.

Let’s presume that you are working in a dry environment, and have to wear protective glasses. Your eyes get dry very quick and this is everything, but not good for your eyes. Don’t worry. Here is the solution. Acuvue Oasys lenses are designed for those who stay a longer time in dry environment, stay a lot in front of a computer, or people whose eyes get tired fast.

Ah, yes. We forgot the ones who suffer from astigmatism. This is a common eye problem. This defect of the eye presents itself in a blurry vision and it means that the incoming rays do not meet in the same focus point in the eye. Acuvue has a solution for this problem, too. Acuvue Advance for Astigmatism and Acuvue Oasys for Astigmatism lenses were made for people with this problem.

Everybody can see now, why people are led by the name. It’s because the name comes with quality. So if you want to buy a contact lens, read the name on the box.


Vision Therapy – The Tool for Visual Improvement

Vision therapy is kind of physical remedy for some of the diseased condition of the eyes and brain. It is a highly useful non-invasive therapy for various visual problems like diplopia (double vision), amblyopia (lazy eyes), squint (crossed vision), convergence or divergence difficulty, problem in near vision and some other learning deformities.

Vision therapy is mainly of two types – orthoptic vision therapy (scientifically named as orthoptics) and developmental optometry (used for some cognitive and behavioral diseases). Optometry deals with the visual acuity problems like squint and diplopia. The developmental optometry is contended with the psychological and behavioral problems like attention deficit disorder, inability to stare at a particular point or a field. This program is sometimes referred as vision training. Both of these procedures are often used in conjunction to get better result in cases of diplopia and squint. Both the procedures are highly sophisticated and engage dedicated computerized optical devices including various lenses, prisms, different clear and colored filters, eye-patches or occluders, devices for balance training and visual-sensory-motor coordination training devices.

Vision therapy is not just another visual exercise program. It must be done under close supervision of an optometrist or an ophthalmologist. Some children do not perform well in the class due to their inability in focusing the gaze. There are difficulties in reading comfortably and efficiently. Vision therapy can come handy in this situation. Although optometrists do not teach how to read well, they try to counter the problem in reading problem caused by diplopia or squint.

Orthoptic vision therapy and behavioral vision therapy – both are highly personalized for any individual. Eye exercises are recognized as an element in the multidisciplinary approach for the difficulties in reading and learning. The exercises are developed in such a way that they act together to correct convergence and divergence, accommodation and other motor function of the eye muscles. They can rectify the processing of the stimulus from the outside (like in cases of lazy eyes and in the dyslexics). Treatment for a mentally challenged child or adult must be a multidisciplinary approach. As the treatment centers curing the main problem for survival like having food and toilet training, vision therapy sometimes comes late in the pipeline. Nevertheless, if vision therapy can be started early in the disease, the patient can have little problem. The treatment requires a thorough optometric investigation of the eye, the optic nerve and the part of brain that helps us to see. A close liaison with other specialties will definitely help in giving support to the patient.

Vision therapy is usually conducted in the chamber of the optometrists or the ophthalmologists. Once or twice weekly session of 30 minutes to one hour is sufficient. The duration of treatment depends upon the nature and the extent of the problem. Patients are sometimes advised to take the exercises in their homes (home reinforcements). As the behaviors of the patients are different from person to person, behavioral optometry is also highly individualized.

Vision therapy is a boon to those unfortunate persons who face difficulties in their vision. If carefully and appropriately advised, vision therapy can improve the visualization a lot.


How to Improve Your Vision without Going to Doctor

visionOur eyes are, by far, the greatest possession we have. Without it, the whole world will go into darkness. Unfortunately, as we grow older, the sharpness in our vision decreases. This may be due to some diseases or a natural aging process. Cataracts, macular degeneration, diabetes, retinal detachment, eye trauma, Vitamin-A deficiency, chronic purulent conjunctivitis are some common conditions to bring dimness in our vision. Nevertheless, we want our vision should remain perfect all the time. For that we have to adopt something that can improve vision.

We can do it by three ways – by modifying or supplementing our diet with vision friendly foods, modifying our lifestyle and by doing some eye exercises. Let us discuss about the foods first:

Breakfast with carrot soup – carrots are rich source of Vitamin A and beta-carotene. These two elements are very much helpful in proper vision.

Take 100 grams of blueberry pieces and mix it with 100 grams of yogurt. Blueberries are very much helpful in reducing the age related macular degeneration.

Aspalathus, an herb native to South Africa contains antioxidants akin to blueberry. It helps in promoting vision besides boosting up immune system.

Spinach is also good to your eye. Take spinach soup, steamed spinach or spinach quiche 2-3 times in a week.

Bilberry jam is another food to help in betterment of vision.

Sea fishes are good source of antioxidants. You can have them as much as you can.

Red onion, sweet potatoes, pumpkins are again good source of Vitamin A. Include them in your diet.

Extract of the Mahonia grape seeds can save your retinal blood vessels from UV rays. It particularly helps in slowing of the natural aging process of the eyes.

Now what can you do about lifestyle modification. While sitting inside your car, lower down the AC vents away from your eyes. Air-conditioning can create dry eyes. Regular exercise can improve blood circulation in your eye.

There are some exercises dedicated to improve your vision.

Sit on a chair in a relaxed position. A quiet environment is preferred. Rub your palms until they become warm enough. Cover your eyes by the palms in a cupped manner. Hold it until the palms become cold again. Repeat the whole procedure for 4-5 times.

Remove you palm. Firmly close the eyelids. Then gently try to open them with your fingers. Continue this procedure for 3-4 minutes. Then gently apply pressure over the eyeball with the ball of your respective thumb. Massage the eyelids in a circular motion for 2-3 minutes.

Open your eyes. Roll the eyeball clockwise and counter-clockwise. Each rotation should continue for 2 minutes. Make sure you blink in between the change of movements.

Now sit beside a window. Place a pencil or a candle about six inches from the eye. Now fix your gaze at the horizon. Continue it for 1 minute. Then rapidly fix your gaze at the tip of the pencil. The process of changing the vision should take less than a second.

All these exercises explained here are especially designed to improve the condition of the muscles present around the eyes.

Together with the exercises and the appropriate foods, you can improve your vision considerably.


Cataract – The Most Common Cause of Blindness

Cataract is a state of the lens in our eyes where it becomes opaque. In normal human being, the lens is clear so that light can pass through it and creates images over the retina. But in case of cataract, the light rays cannot pass the lens as it becomes opaque. According to a recent World health Organization (WHO) survey, there are more than 18 million people worldwide suffering from cataract. In most of the African and Asian countries, there is either inadequate reporting of the disease or comprehensive treatment is unavailable. All these factors make cataract the leading cause of blindness. It is also the main cause of dimness of vision in both developing and developed countries.

The common age group of cataract formation is beyond 40 years. There is no definite sex predisposition. But it is more common in male patients in the developing countries. Senile cataract (of the old age) occurs due to denaturation or coagulation of lens protein.

Cataract can be classified into three categories – nuclear, subcapsular and cortical. A nuclear cataract affects the core of the lens. At the early stages, eyes can change the focal length of the lens to focus the light over the retina by a process called accommodation reflex. There is improvement of near-sightedness if a person already suffers from it. Gradually, as the denaturation of lens progresses, the opacity engulfs the whole of the lens. At this time, a cataract is called mature and it can be operated. Subscapular cataract occurs directly in front of the retina just beneath the outer capsular covering of the lens. It heavily impairs the vision and a person can see colored haloes around the light during night time. The cortical cataract represents itself as white streaks over the outer cortex of the lens. It is a slow growing cataract and the impairment of vision is less than the other two variants.

Cataract can be the consequences of trauma to the lens or some infection of the mother during pregnancy (congenital cataract due to Rubella virus infection). Metabolic disorders (like diabetes), smoking, alcohol abuse and acute exposure to ionizing radiation can also lead to cataract.

In early stages of cataract, there will be dimness of vision or night blindness. The patient may see colored haloes around a light source. Double vision (diplopia) of a same object into one eye is another common symptom. As the cataract progresses, there will be frequent change in the power of the lens.

Cataract can easily be diagnosed by careful observation. An ophthalmologist will dilate the pupil by giving some medicine and will have a better look of the lens. A slit lamp examination with a specialized microscope will determine the exact type of cataract.

Extraction of the opaque lens and implantation of an artificial lens is the main treatment modality in cataract. Phacoemulsification (Phaco) and posterior chamber intraocular lens implantation is most commonly done worldwide. By this method, a foldable lens is carefully placed in the chamber as the opaque lens is evacuated out by a tiny incision. The other two surgical methods are extracapsular and intracapsular cataract surgery. After phaco surgery, a patient can go home in the evening and can join his normal activities after 3-4 days. Only after 45 days, he is prescribed a specs, if need be.

Contact Lens: Good or Bad

contact lensForget those days of wearing any heavily clad spectacles in your eyes. Now contact lens has come to solve the problem for you. Modern contact lenses are made from synthetic polymers. Contact lenses can be used for correction of visual imparity or simply for cosmetic purposes.

Throughout the world, an approximated population of 125 million is wearing contact lenses. More than 40% of those come from either US or Japan. Doctors prescribe contact lenses for correction of near vision (hypermetropia), distant vision or farsightedness (Myopia) and if there is any aberration in the contour of the cornea (astigmatism). These are simply effortless to wear when you know the correct technique. However, for the first time users, it may take a day or two to become well acquainted with the method of wearing the contact lens. Wearing a contact lens is pure pleasure. It does not cause any heaviness in front of your eyes unlike spectacles. You don’t have to go for the costly corrective eye surgery either, which can be detrimental if not done properly.

At the very beginning, before the invention of corneal lens in 1949, contact lenses were made from glass. It caused real problem for the person who was wearing it. This is mainly due to the characteristics of the glass. Our eyes need oxygen for various reasons; nutrition is being the most important cause. This oxygen is primarily supplied by air. When a glass was covering the cornea, there was no point coming in contact with the atmosphere. Therefore, it had become a troublesome experience to wear the contact lens for a longer time. This crisis was countered with the invention of various gas permeable polymers. Contact lenses made from these polymers are collectively called Rigid Gas Permeable lenses (RGP lens). After that some soft polymers were also developed to produce the contact lenses.

Therefore, contact lenses have two main categories – rigid lens and soft lens. Rigid lenses are again classified into older gas-tight and recent gas-permeable lenses. Soft lenses are also sub-divided into low moisture content (less than 50%) and high moisture content (more than 50%). Rigid lenses are for prolonged use. You can use the lens for up to five years without changing it. Only thing you have to do is to put off them during night time and clear it with disinfectant solutions. On the contrary, soft lenses need regular changes. Presently they are coming in disposable form. These lenses you have to discard permanently once you remove them from your eyes.

There are various contact lenses for cosmetic reasons also. Lenses come in different colors, patterns. Nowadays, they can be studded with tiny bright objects to suit your needs.

Contact lenses can be spherical, multifocal or toric. Spherical lenses are prescribed to counteract long or shortsightedness, multifocal lens is used for the treatment of presbiopia (when eyes cannot quickly accommodate itself in changing intensity of light) and the toric lenses are meant for the astigmatic eye.

Wearing contact lens is better when it comes to comparison with spectacles. Contact lens gives you more ‘field of vision’, there is less chance of change in the power of your eyes and lastly the cosmetic value. Only drawback of a contact lens is maintenance. You have to clear and disinfect the lenses regularly with proper fluid.

Dry Eyes: The Things You Should Know

dry eyesOur tears express many of our moods. The things make you sad will bring tears to your eyes. Again on the extreme opposite hand, tremendous enjoyment also makes you cry. But have you ever thought of the situation when your eyes become dry? Well, it can happen and the condition is called Dry Eyes Syndrome.

Dry Eyes Syndrome is medically termed as Keratoconjunctivitis Sicca or Sicca syndrome. More than 10 million American citizens are suffering from dry eyes. If the tear is evaporated from the eyes at a rate which is more than normal or more commonly if the production of tear by the tear gland becomes compromised, the Dry Eye Syndrome (DES) can occur. Tears are the main source of nutrition and lubrication of the most outer part of our eyes. In case there is less tear production, this outer surface becomes dry. And every moment we blink or come in contact with the outer world, this layer gets irritated. Now let us know that the outer layer of the eyes is very much delicate. Here lies the cornea through which light rays fall over the lens and after that to the retina. If there is less amount of tear, there will be friction between the inner surface of the eyelids and the outer layer of the eyes. After a certain time, there is fair chance of production of opacity over the cornea, which means blindness.

The common symptoms of DES include a constant irritation on the eyes. You will feel that some small particles have entered and there is continuous gritty sensation. In DES, both the eyes are usually involved. There will be pain in the eyes, redness and feeling of heaviness behind the eyeball. There is secretion of exudative white fluid from the eyes which does not relieve the symptoms. The symptoms worsen in conditions of constant gazing like sitting in front of a computer, watching television, reading or driving. They also aggravate in windy and smoky atmosphere and become a bit lessened in humid conditions.

As it was already mentioned, DES occurs when there is less production of tear from the eyes. The cause is mainly idiopathic (where the actual cause cannot be differentiated). The common medical conditions where it can occur are – congenital absence of tear (lacrimal) glands, Xerophthalmia (Vitamin A deficiency), Sjögren’s syndrome, Rhuematoid Arthritis, SLE and Wegner’s granulomatosis. Long standing use of some drugs like diuretics, antidepressants, oral contraceptives and some hypertensive drugs can bring out DES.

Your ophthalmologist can diagnose the case only from the symptoms itself. Schirmer’s test is performed to quantify the amount of tears produced from the lacrimal glands. Recent development in diagnosing DES is to measure a special molecule called Ap4A in the tears. It can increase in some cases of DES.

Your doctor will tell you to avoid the conditions where you may have to gaze for a long time. The treatment includes instillation of artificial tear preparations over the eyes and to block the tear outflow system that drain out tears. Presently, there are over-the-counter artificial tear preparations available which means you don’t have to carry a doctor’s prescription to buy a product. Food additives containing Omega-3 fatty acid have shown to reduce the symptoms of DES to a certain extent. Instillation of Cyclosporin drop has also beneficial activity on DES. A small surgical procedure can block the mouth of the tear drainage system.

DES can be very irritable. You must consult the ophthalmologist once you feel that your eyes have become dry. Early diagnosis can make the condition more favorable.