S4Optik Trial Clip (Janelli/Halberg) - Pair

Jannelli and Halberg Trial Lens Clips are in effect, trial frames that may be fitted over a patient's spectacles. Excellent for checking presbyopic addition when the patient's distance is known to be correct. Check prism in any position and power; to accept plus or minus lenses during retinoscopy or muscle balance tests. Check range of refracting using a child's existing frame.