Advantages of LASIK Surgery

There are now various ways to correct vision problems, LASIK being one of the most popular. LASIK, also known as in situ keratomileusis, is an eye surgery that uses laser to reshape the cornea under the corneal flap. Some of the vision problems that it can correct are astigmatism, nearsightedness, and farsightedness. It is also known to correct refractive errors, minimize or totally eradicate the need for glasses or contact lenses, and improve a person's overall vision. It was believed to have been developed around 1991 by the Greek Ioannis Pallikaris.

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In order to perform a LASIK surgery, a specially trained eye surgeon is needed. Like Dr. Marc Tay. Dr Tay comes with a wealth of experience having worked at the Eye Department of the Singapore General Hospital, the Tan Tock Seng Hospital, the Toa Payoh Hospital and the Singapore National Eye Centre. He was a member of the Founding Group of Refractive Laser Surgeons when LASIK was first introduced at the Singapore National Eye Centre.

The process starts by the surgeon creating a flap in the cornea using a microkeratome. The surgeon then pulls back the flap and uses the laser to reshape the cornea in the corneal tissue underneath. The reshaping of the cornea varies depending on the need of the patients. The corneal flap is positioned back to its place, no sutures needed. Surgery usually just lasts for 10 minutes, more or less.

After the surgery, the doctor will prescribe eye drops in order to prevent inflammation and infection. The eyes can also get very dry at this time, so the drops are necessary to keep it moist. The drops might cause a blurry or burning sensation in the eyes, but it will be gone immediately. Never ever use eye drops that are not prescribed by a professional eye doctor. After the LASIK surgery, there will be a few more trips back to the doctor for follow up checkups.

Included in the advantages of going through LASIK surgery are the following—it works and the improvements can be noticed right away, enhancements can be done to increase the improvement, the surgery is almost painless because of the numbing drops, there are no bandages or sutures, and there are even a lot of cases wherein the need for glasses or contact lenses among patients are totally eliminated or significantly reduced.

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Different Types of Liposuction

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Liposuction, also known as lipoplasty or liposculpture suction lipectomy (“suction-assisted fat removal”), is a cosmetic surgery operation that removes fat in any part of the body. According to the American Society for Aesthetic Plastic Surgery, liposuction is the most famous surgery operation in America performed in 2006 with 403,684 patients. The American Society of Plastic Surgeons defines “large” in this context as being more than 5 liters (around 10½ pints). Liposuction is frequently done on the abdomen and thighs in women and the abdomen and flanks in men. The main goal of liposuction is not to reduce body weight but to reshape one or more areas of the body. Liposuction is typically used on “problem” areas that have not responded well to diet and exercise due to some circumstances. There are also other areas of the body that are treated by liposuction rather than the abdomen and the thigh. The commonly treated areas are the face, neck, abdomen, back, buttocks, legs, and upper arms.

There are several types of liposuction. According to LipoSite.com, the types include laser-assisted liposuction, PAL (power-assisted liposuction), SAL (suction-assisted liposuction), TCAL (twin cannula-assisted liposuction), tumescent liposuction, and UAL (ultrasonic-assisted liposuction).

In laser-assisted liposuction, fat melts using a concentrated laser beam light, which starts to break down your fatty tissue with less inflammation, less bruising, and less bleeding. PAL uses a mechanical cannula that extracts fat with smaller incisions and a more precise and shorter surgical experience. SAL is a traditional liposuction method using a small cannula attached to a pressurized vacuum. With TCAL, a twin cannula is used in this mechanical method that removes most of the labor on your plastic surgeon's part. There is no burning and less scarring when using the twin cannula. Tumescent liposuction uses tumescent fluid injected into the fatty tissue; the plastic surgeon uses a cannula to suction out the fat while your blood vessels contract, resulting in less blood loss and less bruising. Unlike lasers and suction, UAL stimulates the fatty tissue's cells causing them to rupture and liquefy and then get extracted.

About the Author:
Dr. Kevin Teh is an experienced general practitioner with a special interest in Aesthetic Medicine and subsequently built up years of experience with rigorous training in various disciplines.

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Using Active Vibration Control Systems to Stabilize DIC Microscopy Systems

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Differential interference contrast (DIC) microscopy is a specialized technique used in the study of live and unstained animal and human tissue samples in medical science. The accuracy of the system relies on the spatial uniformity of its many parts. Due to this, active vibration control is necessary to ensure image accuracy. 

DIC microscopy is a method of optical microscopy illumination that enhances contrast in transparent specimens. Polarized light is directed into a modified Wollaston prism to split the light into two separate beams. One of the beams is directed towards the specimen, while the other only passes through the background. Both beams are recombined through another Wollaston prism, located above the microscope's objective lens.

This technique is able to produce contrast that visually displays the gradient of optical paths in every part of the specimen. The resulting image is monochromatic and has a three-dimensional appearance. 

The components of a DIC microscopy system, including the light source, stage, and prisms, must maintain uniform distance to ensure the clarity of the image. Subtle vibrations coming from the central HVAC unit, equipment in adjacent rooms, and traffic along the hallway can affect the system and decrease the quality of results. Noise from outside the building and the equipment present in the lab also produce vibrations.

Active vibration cancellation systems are necessary to ensure the stability of DIC microscopy systems. These advanced systems utilize piezoelectric sensors and actuators to detect incoming vibrations and react by either tuning isolators to minimize vibrations or sending a signal to cancel them out. The system also creates a feedback loop that dampens inherent resonances in mechanical structures. Active systems can be combined with passive isolation systems, such as stiff metal springs for load support, to isolate a broad range of frequencies. 

To find environmental solutions that can ensure the accuracy of DIC microscopy systems visit Herzan.com. 

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