Ocular Histoplasmosis Syndrome (OHS) is a major cause of visual impairment in the eastern and central United States where 90 percent of adults have been exposed to histoplasma capsulatum. This common fungus is found in molds from soil enriched with bat, chicken or starling droppings and yeasts from animals.
Although the fungus is not found directly in the eye, people with OHS usually test positive for previous exposure to histoplasma capsulatum.
Histoplasmosis is usually mistaken for a cold. The symptoms are very similar. The body's immune system normally overcomes the infection in a few days. The only evidence of histoplasmosis is histo spots, tiny scars on the retina. Generally histo spots do not affect vision, but for unknown reasons, some people can have ocular complications years or decades later.
Doctors believe that the histoplasmosis spores travel from the lungs to the eye where they settle in the choroid, the layer of tiny blood vessels that provides blood and nutrients to the retina, the light-sensing layer of cells lining the back of the eye.
Ocular histoplasmosis develops when fragile, abnormal blood vessels grow under the retina. The abnormal blood vessels form a lesion known as choroidal neovascularization (CNV). If left untreated, the CNV lesion can turn into scar tissue and replace the normal retinal tissue in the macula.
The only proven treatment for OHS is a form of laser surgery called photocoagulation. The laser's small, powerful beam of light destroys the abnormal blood vessels, as well as a small amount of the retinal tissue. Treatment is not necessary unless the new vessels are in the macula, the part of the retina responsible for acute central vision.
Although only a tiny fraction of people infected with the histoplasmosis virus develop OHS, if you have been exposed to histoplasmosis you should be sensitive to any changes in your eyesight.
An independent review of last year's results at the Boston Eye Group shows that 92%-96% of our patients were able to see 20/25 or better. 100% of patients were able to see 20/40 or better. This will usually enable you to pass a driver's license eye examination without glasses or contact lenses. Most patients are able to perform their daily activities and enjoy many sports with minimal, if any, reliance on glasses.
Contact us to learn more about Laser Vision Correction and other surgical treatment options to improve your vision. Our specialists have extensive experience and training, and our patients report great satisfaction with their laser eye surgery. Dr Melki is on the clinical faculty at Harvard Medical School and has conducted thousands of laser eye surgery procedures. Learn more about Laser Eye Surgery and financing options. We have a page on this website dedicated to discussing LASIK patient financing. You can even fill out an online application to qualify for LASIK financing. We offer 0% financing, on approved credit with low fixed monthly payments, no down payment and no pre-payment penalty.
In addition to superior experience, ensuring the utmost success and safety during laser vision correction involves using state-of-the-art equipment and highly trained personnel. This is translated into a higher cost than found at the so-called "discount Lasik chains". We believe that our patients understand that a compromise on quality is unacceptable when it comes to one's vision. It is our commitment to best service and technology that determines our pricing model.
Are you ready to reduce or eliminate your dependence on glasses or contact lenses? The iLASIK Procedure is the result of a decade's worth of technical refinement; it combines all of the most advanced all-laser LASIK technology in one efficient LASIK procedure... It simply doesn't get any better, so now is the time.
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12.04.2011 um 4:03