The Reichert Radiuscope Instrument is an internal reading microscope for contact lens measurement and inspection. Target images are quickly focused allowing scale readings to be obtained in seconds
A special vertical illuminator contains the 6.5V lamp, filter, pattern target and aperture selector slide.
A Radisucope is used to determine ‘Base Curve Radius’ (BCR); one of the most important parameters to verify in contact lens fittings, primarily because it affects the lens-to-cornea fitting relationship.
When using a radiuscope, make sure the lens is clean and dry, so it will provide clear images. Fill the lens mount with saline. You’ll find the real image on the lower end of the scale and the aerial image at approximately 6mm to 9mm on the scale. Both images appear as spokes or stars. After locating and centering the aerial image, lower the instrument to the real image. When the real image is in clear focus, zero the radiuscope and then return to the aerial image. At the point where the aerial image is in clear focus, read the BCR from the scale. Here’s a troubleshooting tip: If the lens is warped or has toric curves, then you’ll see a partial aerial image, and the image that’s 90 degrees away will appear at a separate reading. The first image is the steeper curve and the second image is the flatter curve.