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Keratoconus

Keratoconus, or "conical cornea" (from kerato- cornea and conus cone), is a degenerative disorder of the eye in which the cornea thins and changes shape to become more conical than the normal parabolic. more...

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Symptoms and diagnosis

Keratoconus can cause the vision to become distorted quite badly, with "ghosting", "streaking", and light sensitivity all often reported. The exact nature of the visual distortion introduced by keratoconus is most clearly seen with a high contrast field such as a point of light on a dark background – instead of seeing one point the person may see over 100 images spread out in a complex and random pattern. The pattern does not change from day to day, but over the seasons it often takes on new forms. Doctors tend not to ask exactly what the patient sees, but rather test the vision on a standard Snellen chart of progressively smaller letters. Definitive diagnosis is obtained using corneal topography, a non-invasive visualization of the shape of the surface of the cornea.

The visual distortion comes from two sources, one being the irregular deformation of the surface of the cornea; the other being scarring that occurs on its exposed highpoints. Although some think the scarring is from abrasion by contact lenses, the phenomenon also appears in those who do not use lenses and as such appears to be an aspect of the corneal degradation.

Keratoconus and the associated vision loss, if in both eyes, can affect the person's ability to legally drive a car and function normally. Corrective lenses though, in most cases, allow the person to still drive a car.

Prevalence and cause

The National Eye Institute reports that keratoconus is the most common eye dystrophy in the United States, affecting approximately 1 in every 2,000 Americans, but some reports place the figure as high as 1 in every 500.

Keratoconus seems to have genetic components. Keratoconus is also diagnosed more often in people with Down Syndrome, though the reasons for this link have not yet been determined. Keratoconus has been associated with atopic diseases, which include asthma, allergies, and eczema, and it is not uncommon for several or all of these diseases to affect one person. Science has no definitive explanation of what causes keratoconus, however a number of studies suggest that eye rubbing may contribute to its development.

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O.D. NOTEBOOK
From Optometric Management, 9/1/05

PEOPLE & PROMOTIONS

* Industry veteran Jay Little dies. Jay LiHIe, Briot-Weco's National Lab Sales Manager for the United States and Canada, died last month after a sudden illness. Little spent 40 years in optical equipment sales, starting with Coburn Optical Industries and later working with DAC Vision and Optical Dynamics Corp. "Jay's strong passion for putting his customers first was widely recognized," said Bret Davis, president of Briot-WecoUSA.

COMPANY NEWS

* AcuVue Oasys to roll out on schedule. A Florida court last month denied CIBA Vision's motion for a temporary restraining order to halt the launch of AcuVue Oasys Brand Contact Lenses, by Vistakon.

* AMD treatment wins award. Eyetech Pharmaceutical' Macugen (pegaptanib sodium injection) was named Innovative Pharmaceutical Product of the Year at the 2005 Pharmaceutical Achievement Awards. Macugen is the first and only PDA-approved treatment for all types of neovascular agerelated macular degeneration.

* Partnering on patient education. Eyemaginations and M&S Technologies announced an exclusive partnership to make Eye-maginations' patient education and instructional software available for use on M&S's Smart System 2020 Visual Acuity System. The integration of software systerns will allow users to fully control, select and display the patient education software in the exam room by using M&S's remote control.

* Web site gets renovation. Eyedesign.com's updated Web site features a photo gallery of office interiors, optical furniture collections, planning and interior design information and brochures request.

FOUNDATION NEWS

* Addressing keratoconus needs. Addition Technology announced the formation of The Foundation for Keratoconus Care, a non-profit foundation to help keratoconus sufferers. Addition Is the maker of lntacs prescription inserts for the treatment of myopia and keratoconus. The foundation will provide financial support to patients who do not have the means to undergo an lntacs procedure to treat the disease.

* Network with OWA. The Optical Women's Association (OWA) will host a networking social on Friday, Sept. 16 during the International Vision Expo in Las Vegas. The event will be held in The Venetian hotel's Bellini Ballroom from 6:30 to 7:30 p.m.

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