Eyeglasses with three divisions of correction in the lenses are called trifocals. These are considered to be better than bifocals even if it sounds harder to see through. The underlying principle is simple – when a person is progressing from one step to another, an intermediate step between the two steps makes it easier for the person. So do not think that having three different corrections will make tougher to see through.

People with acute presbyopia are usually prescribed trifocals. These people require vision correction at all three steps – long distance, intermediate and near/reading distance. The calculation for the intermediate correction is usually made by halving the reading addition. For example, if a presbyopia patient has -4 diopters with a +3 reading addition; the net power is -1 and hence the intermediate correction would be -2.5 diopters.

As can be understood, trifocals are different from bifocals. Bifocals only have two different corrections on each lens. Trifocals on the other hand have three different vision correction stages. So, trifocals offer more clarity in vision and less strain on the eye.

Trifocals belong to the multifocal classification on glasses.

Trifocals are similar to bifocal glasses. The only difference is that they are equipped with a three level vision correction lens on each lens instead of two level vision correction lenses.

In addition to the distance vision correction and near/reading vision correction like in bifocal lenses, trifocals have an intermediate correction field in each lens to give a better viewing experience.

The calculation for the intermediate area is simple enough. Let’s say that a person has been found to have a power of -4 diopters and +3 addition for reading correction. With these numbers, we know that the net power is -1. The rule for finding out the intermediate is halving the reading addition. So with the given numbers, it would be -2.5 diopters.

The trifocals have the usual semi-circular area with the reading addition like bifocals. There is also the area for seeing things in the distance. And in addition to these two, there is a narrow band of intermediate correction viewing area in the middle of the lens for seeing things that aren’t very far but are further than the reading distance. This is immensely useful for many people. For those who need this area more, like those who are constantly working on computers, it can be made bigger on demand.

People who suffer from acute presbyopia are usually prescribed trifocals. The term has been derived from Latin and it means ‘ageing eyes’. This means that has the body ages, the eyes lose their capacity to adjust and focus on different things. This usually happens after a person reaches 40. Usually this can be countered with corrective glasses, refractive surgery or contact lenses.

But sometimes these measures are not enough and the person develops a condition where all three stages of vision need corrective glasses. So instead of using three different pairs of glasses all the time, people go for trifocals.

Now there are progressive lenses that have no lines to distinguish them from the usual lenses. These are called PALs (progressive addition lenses), progressive power lenses, graduated lenses, no-line bifocals and varifocal lenses.

It is very important to pay attention to your appearance in these competitive times. And even if you aren’t there to compete, you will be doing yourself an injustice if you do not look the best you can while you are outside the privacy of your own house. So if you decide to wear your best clothes and then take out your same old reading glasses, it is like stepping out into the world wearing your best suit teamed with your bedroom slippers. In short, a disaster.

So if you do want to avoid looking like a complete wreck, you should take care of what you are wearing on your eyes. Eyebobs give you the chance to do this by providing you with extremely stylish reading glasses.

Think about the statistics involved with reading glasses – with every second about 8 people turn forty all over the world. They will usually need glasses sometime soon. And by the time they are fifty, over 97% of them will require reading glasses. Of course you can go for surgery and spend a fortune or even get uncomfortable contact lenses. But if you want to stick to the comfort of glasses, you can make a style statement even with your reading glasses.

Eyebobs are what you need to get your look together. When it comes to reading glasses, you do not need custom made glasses to achieve this, nor do you need the cheap discount store reading glasses.. You need Eyebobs because they are the trendiest reading glasses in the market. They have exceptionally cool designs that have names like “Loan Ranger” “Fresh Man” “Noble Winner” “AWOL” or even “Skeptic” and you can understand that they are made for those who are bold and not meek.

There are so many reasons for using Eyebobs, here are quick few highlights to help you along: –
o You can turn Eyebob frames into prescription glasses. All you need to do is find and optician and give them your prescription. You can also make them into bifocals, which can be done by an optician. Now no Calvin Klein or Irish Eyes would be able to do that.

o They are made from the best grade optical fibre glasses produced in Europe. The frames are a combination of high tech metals and durable plastic. They are designed with flexible hinges and extended temples for a comfortable fit.

o All the models have UV protection and are scratch proof and shatter resistant.

o You get a hard case with each model to keep your precious eyewear safe from danger.

o You will also get hard to find quarter diopter strengths, which are available in increments from 1.00-3.00.

So you see, Eyebobs are everything you need from your glasses and they are also stylish and comfortable. They will give you a sense of comfort with a bold style that you will get from no other glasses. You just need to go out there and get one.

As mentioned before, all Eyebobs can be made into prescription glasses. So if one optician says that it cannot be done, take it someone else because these are being used for making prescription glasses all over the country.

Presbyopia is one of the most common conditions affecting senior citizens nowadays. Presbyopia is caused by the eye’s inability to focus in old age, especially with near objects. Thus, blurring of vision occurs, more prominently in the dark. Presbyopia typically presents with blurring of vision when looking at near objects, requiring patients to hold objects far away to be able to see or read. Some people who are nearsighted before they are 40 years old find that their nearsightedness is actually surprisingly advantageous, allowing them to see more clearly when presbyopia starts to set in.

Previously, presbyopia was treated with corrective lenses that are able to compensate for the loss of the eye’s ability to focus effectively. If the patient has an additional refractive error, convex lenses can be used. If corrective lenses aren’t enough, senior citizens can be given a prescription for bifocals or multifocals. The downside to the use of these lenses is that they can occasionally distort the images that you see. Also, the prescription of the glasses changes constantly, as presbyopia progresses.

Senior citizens who would rather not use eyeglasses or contact lenses can opt to undergo laser eye surgery in order to correct presbyopia. Typically, LASIK eye surgery is used in correcting presbyopia. Conventional LASIK eye surgery, however, can further aggravate the senior citizen’s inability to see things up close. Thus, instead of employing the typical LASIK eye surgery, a specific approach, known as monovision, is used.

The monovision approach was initially employed using contact lenses. One contact lens corrects near vision in one eye while the other contact lens corrects distance vision in the other. In time, a more permanent form of monovision was developed. Instead of using contact lenses, laser can be used to permanently change the vision of the eye. One eye can be permanently corrected for near vision while the other eye is permanently corrected for distance vision.

Some people find it very hard to adjust to monovision. Before undergoing monovision laser eye surgery, it is a good idea to first try with contact lenses. This will help you determine whether you can handle permanent monovision or not. If you can’t, laser eye surgery may not be for you. You may want to consider other forms of treatment for presbyopia. These treatments include the use of intraocular lenses and novel techniques, such as the use of scleral expansion bands and the surgical reversal of presbyopia, or SRP.

The eye is like a camera. The natural lens of the eye lies immediately behind the pupil. It focuses incoming light on the retina, situated at the back of the eye. It also acts like a regulator for the eye and lets us see things clearly which are both far away and close.

The lens is composed of some protein and water. When we age, this protein content may form small lumps and cloud the lens. This is known as cataract and with time, the clouding can become bigger and cause more obstruction in our line of vision.

Cataract starts in the most innocuous way. You might not even notice its existence, except perhaps a slight blurring of vision. Sunlight or any bright light might seem too glaring. Cataract once detected, does not immediately require surgical intervention for its removal. The doctor may suggest some enhanced aids for visual assistance, like more powerful bifocals, magnifying glasses or adequate lighting for your convenience. Cataract surgery becomes imminent when the disorder has progressed significantly and is causing serious problems with your vision.

There are many who believe that cataract is a normal phenomenon associated with aging – but cataract surgery is very common and an otherwise simple and painless way to get back your normal vision. It is also one of the most frequently-performed eye surgeries in the United States, with over 1.5 million procedures done annually. Ninety percent of the people who have undergone cataract surgery get back their vision.

Since cataract is caused by a cloudy vision, the objective of a cataract surgery is to remove the cloudy lens and replace the same with an artificial lens, which is made of silicone or plastic. These lenses are called intraocular lens or IOL. There has been significant research and developments in the field of IOL manufacture and today, thanks to the state-of-the art IOL available, cataract surgery has become easier for the surgeon and convenient for the patient. The different types of IOL available are the presbyopia correcting IOL which enables you to see things which are situated at varying distances. Another type of IOL creates a barrier for ultraviolet and blue light, which according to research, damages the retina.

During cataract surgery the natural lens of the eye can be replaced with a permanent IOL implant. The surgery involves breaking up the cloudy lens, or cataract, using the process of ultrasound. The process is called phacoemulsification, where the cloudy lens, after being broken down, is suctioned out of the eye. In another process called phacofracture, the broke-down cloudy lens is taken out of the eye through a small ut made in the eye.

What are cataracts? Cataracts affects the lens of the eye causing clouding of the vision. Once cataracts have set in, light is scattered or is fully or partially blocked out. This clouding impairs the vision of the person with cataract.

Though cataracts are an abnormality in vision, it is a normal occurrence in aging. More than 90% persons older than 75 years old have cataract. Most of the time, cataracts affects both eyes but one eye is more affected than the other.

Cataract symptoms may be minimal so that persons affected may not even be aware of it. However, severe cataracts cannot see good enough to function normally in their daily lives.

How do you know if you have cataracts?

One of the telltale signs that you are starting to be affected by cataracts is having foggy, fuzzy, cloudy or filmy vision. There may also be changes in color vision. Night driving becomes difficult because headlights seem glaring, as do lamps and sunshine. Double vision also becomes a problem.

How can cataracts be treated?

The most common way is to change glasses with magnifying lenses and stronger bifocals. But if this method is not enough, surgery maybe required. The treatment will be undergone by removing the eye lens and replacing it with artificial lenses known as implant.

Cataracts can also be removed through surgery and your physician will explain the different options of surgery and how you can prepare yourself.

Laser surgery is one way of removing cataracts. Laser surgery for cataract is still experimentally tested. It utilizes light instead of ultrasound in dissolving cataract. LASEK and LASIK processes fall in laser surgery category.

In LASEK or laser epithelial keratomileusis, the cornea’s surface layer will be treated with alcohol and peeled back to reshape the layer underneath. The process prevents complications associated with cataract.

In LASIK or laser in situ keratomileusis, the surface layer of cornea is scoured away. This is done to reshape the underlying cornea surface. LASIK began in the mid-nineties and has largely replaced the old process of PRK or photorefractive keratectomy since then. With LASIK, a flap is created on top layer of the cornea to allow access to underlying surface of cornea. LASIK prevents most problems of postoperative pain, slow rehabilitation and corneal haze which are seen in the traditional PRK.

Both LASEK and LASIK procedures are effective, predictable and safe for also treating low to moderate near sightedness or myopia. Cataract laser surgery is not performed in the doctor’s clinic because it still needs surgical incision requiring an opening in the eyes.

It will take some weeks to completely heal an eye which undergone the laser surgery. It is advised for patients who have cataracts in both eyes to let one eye heal first before treating the other eye.

Undergoing cataract laser surgery treatment gives benefits as it improves your everyday activities, self confidence, work and safety. Consult your doctor about the available cataract laser surgery treatments available to you.