These plastic, colour-coded flipper lenses are available in ﬁve standard sizes and used for the diagnosis and treatment of accommodative defects. They comprise binocular spherical plus/minus lenses that can quickly be flipped from plus to minus during testing.
±0.50 DS, ±1.00 DS, ±1.50 DS, ±2.00 DS, +2.00/-4.00 DS, ±3.00 DS
The +/-2.00 DS is used to measure accommodative flexibility during a timed reading check. The other lenses are used to treat the condition by practising with a small sphere and increasing the lens strength used.
+/- 3.00 DS flippers are useful in orthoptic practise for diagnostic tests and measurements.
Please note that other sizes may be available upon request.
You may also like the Kay Picture accommodative rock chart.