spotlight on technology & technique
Tomey's TMS-4 Corneal Topographer
The Tomey TMS-4 offers high resolution, increased accuracy and easy operation.
By Leslie Goldberg, Assistant Editor

A corneal topographer is a necessary tool used by ophthalmologists for finding refractive problems in the cornea. It is also used for screening patients prior to refractive surgery, fitting contacts, adjusting post-surgical corneal transplants and diagnosing refractive disorders and diseases. Tomey states that its TMS-4 corneal topographer is accurate, easy to operate and guarantees high resolution with more than 60,000 data points. Tomey's patented light cones use 25 or 31 rings to provide extremely high resolution while promoting patient comfort. The TMS-4's laser alignment system provides a high degree of accuracy and repeatability, while the small cone design provides extensive corneal coverage and eliminates nose and brow shadow.

Operation

Using an illuminated ring pattern and a beam of light that is shined across the cornea, the image sensors in the TMS-4 acquire over 8,000 points of data per eye with corneal coverage up to 10.9 mm. The average acquisition time is 33 ms with an average process time of 3 seconds. This data is then transformed into information about the architecture of the cornea. Data collection on the TMS-4 is achieved with joystick alignment, a low light level illumination and a Placido cone.

Features

The TMS-4 runs the newest version of Klyce Corneal Statistics as well as Orthogonal, Instanta-neous and Zonal astigmatism map display options. The Polar, Rectang-ular and Axis Grids are far more precise than earlier models. Using the Windows-based software, the TMS-4 makes it easy to run queries and the database is large enough to include patient notes and refraction information. The TMS-4 can also be hooked up to any EMR system and has the capability to import all Tomey Exams taken with earlier versions of the Tomey TMS Line.

Tomey TMS-4 Corneal Topographer software provides space for a massive patient database and delivers access to the related patient record card with a single click. The software includes keratoconus screening with both a regression and neural net analysis, displays multiple height and enhanced height maps and 3D images for comprehensive exams that provide accurate data with higher resolution. Custom contact lens fitting fluorescein patterns and a user modifiable database can be transmitted automatically to optical labs.

The Tomey TMS-4 costs $9,500 and may be used with your office's computer or laptop.

Physician Feedback

Hyun Jang, M.D., of Optics of L.A. Optometric Center benefits from the TMS-4's eccentricity value feature most. "As I use the TMS-4 for orthokeratology, it is important to me that I get a general idea of how much correction I can expect. This feature has also allowed me to design regular RGP's in a much more precise manner." says Dr. Jang.

David Dulaney, M.D., of Barnet Dulaney Perkins Eye Center of Phoenix, Arizona, has been using the Tomey TMS-4 for 2 years and says that the TMS-4 helps his practice work more efficiently. "Having the capability to send images and data to our multiple offices is very advantageous to our practice. I also like the keratoconus-screening software that is included with the TMS-4," says Dr. Dulaney.

Contact Information

For more information on Tomey's TMS-4, please call the company at (888) 449-4045.