Dark circles under eyes remedy

November 30, 2009

How Your Eyesight Changes After Forty

Filed under: Uncategorized — Tags: , , , , , , — Saiful @ 2:15 am

Do you struggle to see clearly up close? you may have hyperopia. But it could also be presbyopia. The truth is they are similar optically but have very different causes. Since they are different conditions, the treatment options will vary as well.

Hyperopia occurs when the light that enters the eye can not focus on the retina, because the eye is to short, the light actually would focus behind the eye. This occurs when the distance between the front and back of the eye is too shot. People can have hyperopia at any age. Young children will often out grow hyperopia as they become older. However if they don’t, hyperopia can be corrected with either contacts or eyeglasses. For mild hyperopic corrections some reading eyeglasses can correct vision. Corrective surgery, such as LASIK, is one available treatment option.

Presbyopia, on the other hand, also causes one to have difficulty reading close up, but it is age-related, and affects people over 40. It is the result of the lens inside the eye becoming harder and losing flexibility with age. The visual result is similar to that of hyperopia; poor vision at near. In general, this is corrected with lenses. reading eyeglasses are commonly used to bring clarity to objects at near distances. Another option is to use contact lenses for monovision, when one eye is corrected for distance vision and the other corrected for near vision. Monovision wearers must train their eyes to adapt to a new way of viewing things up close and far away. Very similar to bifocal or progressive eyeglasses, multifocal contact lenses can correct presbyopia.

Hyperopia is not inevitable, and it can be treated surgically. Presbyopia will eventually effect us all, but until very recently was not treated with surgery. When eyes begin to lose flexibility and are no longer to see crisply and clearly close up, it is time for treatment. Even though there are surgical options available for presbyopia, the majority of people still choose a simple pair of readers. They are safe and do not require anestesia of lasers near the eye, plus they can be very stylish too. Once a person has accepted that they need reading glasses, they may as well get a pair that will be fashionable too.

November 27, 2009

Various Multi-View Eyewear For Improved Near Vision

Filed under: Uncategorized — Tags: , , , , , , , — Saiful @ 12:17 pm

Trifocals are and advanced style of reading glasses. Trifocals will provide you with three vision segments, as the name suggests. You might think that it will be difficult to read through a pair of glasses with three lines etched on it, but this is actually pretty easy to get used to. You will find trifocals offer better range of vision once you have adapted to them. You can consider this similar to climbing up steps. Rather than jumping straight up to step three, it is easier to use step two. The three areas of correction are designed ot reduce strain and relax your eyes into clear visoin.

Most doctors will prescribe trifocals over bifocals for advanced cases of presbyopia. If your eye doctor suggests them you will benefit from the near, intermediate, and distance correction. There are complicated calculations to tell you what your net optical power is going to be. Optical power is measured in a special unit called diopter.

Bifocals can offer correction only at two ranges of distance, that is to say, near vision or distance vision. Trifocals will offer a wider range of vision correctoin and corrected distances. Because of this, trifocals is the optimal choice in clarity for a majority of advanced presbyopes.

Trifocals are not right for everybody, they work best for people who have vision challenges in multiple areas. They are designed for more advanced cases of presbyopia. It is the intermediate segment of a trifocal lens that takes some people a little time to get used to. For instance, if you have a power of -4 diopters and a correction of 3 units, you end up with a power of -1. The intermediate vision correction will be -2.5.

o Even a lay person can understand why you get distinctly better vision with trifocals rather than bifocals. They give you three areas of correction, like a bifocal but with built in intermediate vision.

The top portion of the lens will have distance correction, so to see clearly at near simply gaze downward through the lower portion of the lens. The shape of the etched line will be that of a semi circular arc. The near and intermediate portion of a lens is clearly etched with a line.

o The problem of short sightedness is dealt with by a special region near the bottom of the lens. A good optician will fit the eyeglasses and lenses so adaptation is a breeze.

The section that corrects intemediate vision is directly above the full near vision correction. This won’t cover a great range of distance, but will enable you to see clearly those things which are not near and not very far off either.

One pair of trifocals is often all an advanced presbyope needs to read, work, and enjoy good vision. You may find yourself unsatisfied with the line markings that split the varying optical areas of the lenses. If adapting to the lined lenses is an issue or you just don’t like the way they look get progressives. They will work just as well as trifocals. Many people find progressives to be the most comfortable because there are no lines or jumps, just an even blend of correction. With them, you will enjoy optimal clarity and comfort through your eyeglasses.

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