<ul><li>90D Description Patented double aspheric glass optics provide enhanced imaging</li><li>78D Description Patented double aspheric glass optics provide enhanced imaging High magnification provides excellent views of the optic disc and macula Perfectly corrected for field curvature, astigmatism, aberrations</li><li>20D Description 20D Lens provides an extended working distance from cornea. The 20D Aspheric slit lamp lens for non-contact fundus examinations.</li></ul><br><br>Double Aspheric Lens 20D 90D & 78D for ophthamology

Double Aspheric Lens 20D 90D & 78D (Set of 3pcs)