Laser Eye Correction Surgery : Will it Work for You?

Written by Jenna Keys

Technology moves at alarmingly fast rates now, and where glasses or contact lenses have been required inrepparttar past to correct vision deficiencies there is now an alternative. Laser eye correction is a relatively affordable procedure that means you wonít need to wear your reading glasses anymore and can correct virtually any eye problem. It is suitable for any adult with an eye problem and may berepparttar 147800 answer you are looking for.

What is Laser Eye Correction?

Laser Eye Correction, or refractive surgery as it is also known, is a quick procedure usually taking up to 15 minutes per eye. The actual laser treatment consists of less than 1 minute. During this process a laser scans your eyes pinpointing hundreds of unique points on your cornea. Once this is done,repparttar 147801 software used can determine exactly whererepparttar 147802 fault lies and ascertainrepparttar 147803 minor adjustments needed to restore your sight back to a reasonable level. The laser then reshapesrepparttar 147804 cornea so that your eyesight becomes at least 20/40 vision, although in most cases it can be restored completely to 20/20 vision. Your surgeon will, of course, talk you throughrepparttar 147805 exact procedure before surgery commences and if you have any questions, do not be afraid to ask.

You will be administered with anaesthetic eye drops prior to any procedure and a subtle restraining device placed on your eyes so there is no danger of you blinking. The apparatus accounts for small eye movements, so even if you canít quite manage to stare atrepparttar 147806 red light allrepparttar 147807 way throughrepparttar 147808 procedure there shouldnít be a problem.

Most patients suffer from little or no discomfort andrepparttar 147809 recovery time afterrepparttar 147810 procedure is very little. It is advised that on completion ofrepparttar 147811 correction you rest your eyes until next day, donít stare at a television or a computer and donít go anywhere where there is smoke or other pollutants. Next day you should be able to return to your normal daily life withoutrepparttar 147812 need for glasses or contact lenses.

Exactly how effective isrepparttar 147813 treatment?

Approximately 95% of patients have 20/20 vision or better following treatment and half have reported that their eyesight is better after treatment than when using glasses or contacts before. Ordinarily there is no need for further treatment becauserepparttar 147814 sight you have after correction isrepparttar 147815 sight you will have forrepparttar 147816 rest of your life. In fact, many clinics offerrepparttar 147817 equivalent of a lifetime guarantee, so if you do need any enhancements you will receive them free of charge.

The Pathophysiology of Tetanus

Written by Wong Lai Teng

Tetanus is an acute, often fatal disease caused by an exotoxin produced in a wound by Clostridium tetani. Clostridium tetani is a gram-positive, nonencapsulated, motile, obligatively anaerobic bacillus. It exists in vegetative and sporulated forms. Spores are highly resistant to disinfections by chemical or heat, but vegetative forms are susceptible torepparttar bactericidal effect of heat, chemical disinfectants, and a number of antibiotics.

Clostridium tetani is a noninvasive organism. It is found in soil and inrepparttar 147799 intestine and feces of horses, sheep, cattle, dogs, cats, rats, guinea pigs and chicken. Manure-treated soil may contain large numbers of spores too.

Tetanus occurs after spores or vegetative bacteria gain access to tissues and produce toxin locally. The usual mode of entry is trough a puncture wound or laceration. Tetanus may also follow elective surgery, burn wounds, otitis media, dental infection, abortion and pregnancy. Neonatal tetanus usually follows infection ofrepparttar 147800 umbilical stump.

Inrepparttar 147801 presence of anaerobic conditions,repparttar 147802 spores germinate. Toxins,including tetanolysin (which potentiates infection) and tetanospasmin (a potent neurotoxin) are produced. Tetanospasmin, often referred to as tetanus toxin, causes clinical tetanus. The toxin produced is disseminated throughrepparttar 147803 bloodstream and lymphatic system. However, it does not enterrepparttar 147804 central nervous system through this route, as it cannot crossrepparttar 147805 blood brain barrier except atrepparttar 147806 fourth ventricle. The toxin is exclusively taken up byrepparttar 147807 neuromuscular junction, where it migrates retrograde transynaptically atrepparttar 147808 rate 75-250mm/day, a process which takes 3-14 days, protected from neutralizing antitoxin, predominantly to inhibitory synapses to preventrepparttar 147809 release of acetylcholine.

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