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Biomedical subjects

T A Hostetter

Publications and source records attributed to T A Hostetter.

7 recordsLinked to original sources
PubMedDate not supplied

Monocular diplopia: contact lens related warpage?

1. Always do a corneal topography on difficult-to-fit corneas. Use the Tangential map for a true picture of the overall cornea and the corneal cap. Use the Absolute Scale maps to rule out abnormally steep or flat regions in the cornea and for accurate comparisons of both eyes. 2. Understand that fitting a myopic presbyope with contact lenses will have a subset of problems related to accommodation, opposed to fitting a hyperope. 3. If a contact lens is required to make the corneal surface more regular, consider soft lenses, especially if a monocular is needed. The comfort difference in the contact lens eye versus the normal eye will minimal, compared to a gas-permeable lens fit.

Accommodation, Ocular↗
PubMedDate not supplied

Ophthalmology's interaction with the Internet (you say, 'Internet what?').

1. You can be connected to the information Highway by a local phone call. So, you will have a monthly charge for your access, but not a more expensive phone bill. 2. Mail lists are discussion groups; actually, they are "computer remailers." When you join a mail list, your e-mail address is entered into a computer, along with a group of people with common interest on the Net. 3. The World Wide Web is the graphical and multimedia part of the Internet--color, sound, video, and all! To access the World Wide Web, you'll need a browser. A browser is a piece of software that allows you to look at all the Web's various home pages and websites. Organizations, individuals, universities, and corporations have Web addresses (called URLs) that allow you to look at their "roadside stand" on this Information Highway.

Computer Communication Networks↗
PubMedDate not supplied

Extended wear soft contact lenses: to market or not to market.

1. Today, cosmetic extended wear lenses have numerous aliases; continuous wear, provisional extended wear, and flexible wear, all referring to the same products, but on a relative scale of wearing time. Cosmetic extended wear lenses are elective and differ from the medical necessity of extended wear that few patients require. Refractive surgery has made significant advances in the cosmetic extended wear lens market. 2. Despite growing conservatism, positive marketing kept growing the EW philosophy for almost a decade until the FDA laid down some new rules, including a 1-week maximum for overnight wear. Coincidentally, this mandate came with the advent of the disposable lens in 1989. Since then, 1-week EW with disposable contacts has proved to be a safer modality for cosmetic EW; however, the concern of corneal complications continues to decline the market. 3. Patients risk a microbial ulcerative keratitis secondary to cosmetic EW. If daily wear contact lens options or occasional part-time EW is not amenable to the patient, refer the patient to an experienced refractive surgeon. Today, patients have more healthful vision choices than ever before.

Consumer Product Safety↗
PubMedDate not supplied

Learning the "numbers game" of today's contact lens fitting: clinical and business pearls.

A "chair time model" for contact lens pricing is a valuable administrative tool. Relative sagittal depth is an easy comparison to use when evaluating the theoretical fit of one soft lens versus another. Biological oxygen apparent transmissibility (BOAT) and a calculated value of oxygen transmissibility (Dk/L) are two totally different assessments and the significance of BOAT will need to be clinically tested over time.

Contact Lenses↗
PubMedDate not supplied

Eyes on the Web.

Explore the source record for details and available documents.

Computer Communication Networks↗