What is Pi?

Pi is an abbreviation for “presbyopic implants”, not to be confused with the mathematical term pi. These embedded lenses are cutting-edge technology designed by optical engineers employing the newest techniques of nano-engineering. The lenses can be used during a vision correction procesure called Prelex or cataract cataract surgery. They are offered in different shapes and sizes as will be examined later in this book.

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What is Prelex?
Prelex is a vision correction procedure that corrects presbyopia. Prelex stands for Presbyopic Refractive Lens Exchange. Let us apprehend the meaning of each word. Presbyopia is an organic vision change that occurs with age which hinders the ability to see close up objects.
Usually people will start to experience this condition around the age of forty-five and it will then progress with age. This is when most people start using glasses for reading. People who have had previous Lasik eye surgery will also experience this and people already using glasses will proceed to more bulky bifocals or progressives. Presbyopia will make it more difficult to focus on objects near, middle, and far. Presbyopic in the term Prelex means that it treats presbyopia. Refraction is a word for the focusing power of the eye. Refractive suggests decisive manipulation to correct the errors of refraction of the eye. Lens exchange coincides with taking out the eyes natural dysfunctional lens and exchanging it with a newer synthetic biocompatible lens, that enables the eye to see near, middle, and far. Biocompatible relates to the fact that the body will tolerate thereby not initializing allergies or declining the new lens.  Prelex is consequently replacing an ill functioning natural lens with a newer artificial lens. This Pi lens enables individuals to see ay all distances, dramatically decreasing or even eliminating the need for glasses.

How long has Prelex been around?
The Prelex procedure has been developing over the last five decades and during this time millions of individuals have had this lens exchange surgery. It is the creation of a mixture between cataract surgery and Lasik. Prelex was actually invented before Lasik but was held back by a nonexistence of method to remove the non-working lens through a small wound and the inability to perfect results. Only in the 21st century did the Prelex procedure reach a higher level of superiority and patient satisfaction

The Difference between Cataract and Prelex surgery
Prelex surgery is completed to escape dependence on glasses by exchanging the worsening lens before it becomes opaque. For cataract surgeries there are many techniques for the way it us cured. Prelex surgery is a result from the most innovative techniques of cataract surgery and Lasik. In addition, Prelex takes into account the refractive status, therefore eliminating the use for glasses after Prelex. In surgeries of older style cataracts glasses would still be required after surgery. Innovative refractive cataract surgery paired with Prelex releases a person from the burden glasses. Because the Prelex procedure is executed before the eye lens has toughened, it is simpler to remove the dysfunctional lens. This avoids any surgical consequences like harm to the cornea of the eye. Patients who are forty-five and older are usually healthier than patients who undertake cataract surgery. Therefore the risk of diabetes or hypertension influencing the end results is diminished. Prelex surgery is securer than cataract surgery. After a patient undergoes cataract surgery, lens implants may or may not be implanted. When lens implants are implanted they are mostly monofocal type lenses. Prelex surgery involves Presbyopic implants (Pi). In regard to insurance coverage cataract surgery in somewhat covered medical insurance in the United States. Prelex surgery is reflected an elective surgery and therefore currently Prelex is not covered by insurance.

Who can have Prelex?
For those individuals aged forty-five and above looking to become free of glasses and contacts, Prelex surgery is a safe alternative for vision correction. It can be used for vision correction whether a patient is nearsighted, farsighted or has a astigmatism. Patients who do not want to wear glasses or contacts for distance or near vision would be considered good candidates for this surgery. Prelex surgery can even be performed after previous surgeries such as Lasik, Radial Keratotomy (RK), or CK. The objective of this surgery is to restore the full range of vision. Therefore one would be able to read a hiking map on a trail or retain a drivers license without the use of corrective vision. During the Prelex surgery the dysfunctional natural lens of the eye will be replaced with an artificial Presbyopic impant (Pi). The implanted lens placed in the eye will deliver flawless vision at all distances without the use of glasses or contacts. One of the best advantages to the Prelex surgery is that cataract surgery will not occur later in life with this artificial implant because it will be unable to develop on the lens.

Is it a painful, long procedure?
The Prelex eye surgery itself is short and pain-free lasting only 5 to 10 minutes per eye.
Before the surgery patients will be given a small amount of an oral pill such as Xanax to help relax and calm any anxiety. In addition, anesthetic drops will we used to numb the eyes and to ensure the patient is pain-free during the procedure. The eyes will be kept open securely by eyelid retainers therefore allowing the eye surgeon work without the chance of disruptive eye blinking. Recovery time for the Prelex Procedure is relatively short and if needed patients can return to work & drive the next day. The Presbyopic lens implanted into the eyes during the Prelex procedure is FDA approved. Specific instructions will be given to patients before and after surgery explaining any questions or concerns that may arise.

Will Prelex prevent cataracts?
One of the best benefits about the Prelex surgery is preventing the development of cataracts in the future. Also, if a person currently suffers from cataracts Prelex will eliminate the cataracts. Cataracts is when the natural lens of the eye becomes cloudy due to water entering the lens fibers and changing the fibers shape and color. Vision impairment by cataracts starts out gradual but will progress over time increasing potentially to blindness if not corrected.
Cataracts us mostly cause by aging and currently there is no way to 100% prevent the disease. With the Prelex procedure a artificial lens is inserted into the eye replacing the fibers of the natural lens. Cataracts can not form on this artificial lens due to the fact the Presbyopic implants (Pi) are non-living and inert so water cannot affect the lens.

Why have Prelex?
Suffering from reduced vision can limit your life in countless ways and produce unnecessary boundaries amongst you and the physical world. Insufficient vision can be the reason for many struggles in various facets of daily living. It hinders abilities and puts restraints on daily activities therefore eventually costing you time and energy. Reduced vision is in many cases the basis of car, boat, and various other accidents merely because one cannot see as well as one should when operating a moving vehicle. Nowadays, luckily we have the benefit of living without these concerns or struggles. Poor vision can easily be fixed with the safe and easy procedure called Prelex. Prelex has been performed for thousands of patients all over the United States and these patients are now able to see clearer then ever before with precise vision. Prelex is an incredible vision correcting procedure that has even been performed on legally blind patients.

Will it prevent other eye diseases?
Prelex will actually help to prevent other eye diseases such as glaucoma. A thick lens pushing the exit channels of the eye causes glaucoma. Replacing the lens of the eye would prevent this. Prelex however will not prevent the development of macular degeneration or retinal detachment.