Classic 20D Aspherical BIO Lens 50mm with Case

20D Classic BIO Lens — an industry-standard general diagnostic lens ideal for binocular indirect ophthalmoscopy. Double aspheric glass optics deliver clear, high-quality imaging, while the high magnification provides excellent visualization of the optic. The optical design is corrected for field curvature, astigmatism, aberrations and coma. Supplied in a protective case.