A guide to verifying lens accuracy: If you haven’t seen a modern lens inspection system, you’re in for a bit of a shock, because these instruments do so much more than your standard manual lensometer. In fact, the present models have high-tech features that are easy to use and provide data at the touch of a screen or button. Here’s a look at how to use one—the Yeasn LightSpeed autolensmeter from Veatch Ophthalmic Instruments. (For details on other available lens inspection systems, see the chart on the opposite page.)
1. The Yeasn LightSpeed sports a compact design and uses a unique, multi-core parallel processing system for lightning-fast digital data processing from capture to calculation. Its Shack-Hartmann sensor guarantees fast and accurate location of optical centers as well as improved progressive lens measurements.
2. The 7-in. industrial color touch screen has interactive icons that are simple to operate. The icons are laid out according to operation frequency and convenience. For instance, the printer icon, which quickly activates the unit’s built-in thermal printer, is located on the right side of the screen.
3. Once the lens is placed against the table, the Rx is measured in a matter of milliseconds. The sphere, cylinder, axis and prism amount and direction are displayed. Prism measurements of up to 20.00D in the vertical and horizontal direction are included.
4. The centering cross ensures proper alignment of the lens. A simple touch of the screen can adjust the cylinder to minus or plus, and another touch screen input allows for adjustment of the Rx reading in 0.01D, 0.06D, 0.12D or 0.25D increments.
5. The LightSpeed’s auto-identification mode automatically identifies the lens type as single vision or progressive and will instantly switch to the corresponding measurement mode. Pupillary distance, pupillary height and UV absorption measurements are easily accessible as well.
The simplicity, number of features and remarkable accuracy of today’s lens-inspection systems make them a valuable addition to any office.
Kim Pickett, COMT, is a certified ophthalmic medical technologist and ophthalmic writer in Minneapolis, MN.