Archive for March, 2010

Therapeutic and Corrective Use of Contact Lens

The most common use of contact lens is corrective use, to correct the refractive errors of the eye. Contact lens is also sometimes used for therapeutic purpose.

Therapeutic use of contact lens:

Commonly soft contact lenses are used for therapeutic purpose and for treatment of non refractive errors of eye. Sometimes soft contact lenses are used to protect the injured eye or in corneal ulcer to allow the injury to heal properly. Soft contact lens is used for protecting cornea from constant rubbing of cornea due to blinking, which is known as bandage contact lens.

Other common uses of therapeutic contact lens are in dry eye, keratitis, corneal edema, bullous keratopathy, anterior corneal dystrophy, etc.

Corrective use of contact lens:

Corrective contact lenses are like glass (spectacles) that help to focus light correctly onto retina, so that we can see correctly without any error. Common refractive errors of the, such as myopia (short sightedness or person unable to see objects far away), presbyopia, hypermetropia (long sightedness or person unable to see objects which are near), astigmatism are best suited for use of contact lens. Corrective contact lens can improve vision, which may not be normal due to refractive errors of the eye.

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Posted by - March 31, 2010 at 11:22 am

Categories: General   Tags:

Contact Lens for Your Eyes

Contact lens is used for various purposes, such as correction of refractive error, cosmetic purpose (to change the look) and therapeutic use (known as therapeutic contact lenses). The most common cause of use of contact lens is for correcting refractive errors of the eye. It is estimated that more than 125 million individuals are using contact lenses at present and most common purpose is obviously the correction of refractive errors. Small percentage of contact lenses is used for cosmetic reason and even smaller percentage for therapeutic purpose, although use contact lens for cosmetic purpose is increasing slowly, but steadily.

The availability of disposable contact lens has increased the use of contact lens due to easier way of handling and the taking care part of the contact lens has become very simple. The disposable contact lenses may be cheaper then non disposable contact lenses, but the actual cost of using disposable contact lens may be higher. The only disadvantage of disposable contact lens is the cost, which may be higher than non disposable contact lens for long term use as the requirement of several disposable contact lenses for several days. Slowly disposable and cheap contact lens is also coming to the market. But one should always compare the advantages and disadvantages of using disposable and non disposable contact lenses.

It is always advisable to compare contact lens, from one with another, in terms of durability, cost and comfort of use. You should always think what you need, if you can take care of contact lens regularly, then you can go for a non disposable contact les, which will be cheap in the long run, but if you do not have enough time and can not take care of your contact lens, you should go for disposable contact lens.

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Posted by - March 30, 2010 at 12:18 pm

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Treatment of Syphilis

The causative agent for syphilis is Treponema pallidum, a spirochete. Syphilis is still fairly common disease (it is a sexually transmitted disease), despite presence of very effective antibiotics such as penicillin. At present globally more than 10 million people contact syphilis, annually. But there is a sharp decline of more than 95% in the past 50 years in the incidence of syphilis after advent of penicillin therapy to treat syphilis effectively.

The antibiotic of choice for treatment of syphilis is still penicillin for all the stages of syphilis. There is no reported incidence of resistance of Treponema pallidum to penicillin and hence still the drug of choice.

The CDC has given a guideline for treatment of syphilis in the year 2006 which is given below:

  • Treatment of syphilis in Primary, secondary, and early latent phase of syphilis is Penicillin G benzathine (a single dose of 2.4 million units intramuscularly).
  • Late latent phase, or cardiovascular involvement, CSF (cerebrospinal fluid) analysis should be done. If CSF is normal Penicillin G benzathine 2.4 million units intramuscularly weekly for 3 weeks. If CSF is abnormal it should be treated as neurosyphilis.
  • Neurosyphilis, either symptomatic or asymptomatic is to be treated with aqueous penicillin G, 18–24 million units intravenously, given every 4 hourly (3–4 million units) or by continuous intravenous infusion. Alternative regimen is aqueous penicillin G procaine, 2.4 million units intramuscularly plus oral probenecid (500 mg every 6 hourly), both for 10–14 days.
  • During pregnancy the treatment is same as with general population and according to stages.
  • If patient is sensitive to penicillin, alternative includes Tetracycline hydrochloride (500 mg orally 4 times a day) or doxycycline (100 mg orally two times a day) for 14 days. Penicillin sensitive pregnant patients or patients with neurosyphilis have to be treated with penicillin after desensitization.
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Posted by - March 9, 2010 at 1:09 pm

Categories: Disease Treatment   Tags: ,