20D Double Aspheric Lens, Black

20D Double Aspheric Lens Black color Magnification 2.97X, Working distance 47 mm View the retina including periphery using a head-mounted BIO 20D Double Aspheric Lens, Black - Higher magnification than 28D. Ideal for pediatric examination, when scleral indentation is required. Useful when slit lamp examination is not possible. Ideal for pediatric examination, when scleral indentation is required and for patients with nystagmus.