What is 20D magnification?
Click to view a larger image. Industry standard general diagnostic lens. Lens is 20D with a field of view of 46/60 degrees, an image magnification of 3.13x, a laser spot of 0.32x and a working distance of 50mm.
What is 90D lens examination?
This slit lamp lens is used for general examination of the fundus and small pupil examinations. This Slit lamp lens is the most popular power for non-contact fundus examination. It offers a wide-field fundus imaging out to and beyond the equator.
Which is better 78D vs 90D?
The traditional 78D has been in use for decades and is an excellent general purpose fundus or macula lens with better stereopsis than the 90D. The Super 66 and Digital 1.0x, both 66D, provide 1.0x magnification for optic nerve measurements without applying a scaling factor.
What is Hruby lens?
Hruby lens (Figure 1 & 2) is a high minus (originally -58.6 D) non-contact lens mounted on the slit lamp for stability. It provides a high resolution, upright image of structures in the posterior pole. …
What is 5x diopter magnification?
For a 5-diopter lens of a magnifier, its magnification = 5/4 + 1 or 1.25 + 1 = 2.25x. Objects viewed under a 5 diopter lens will appear 2.25X larger than normal.
What is Gonio lens?
3-15 Indirect gonioscopic lenses use mirrors or prisms to it has no handle to reflect the light from the irido-corneal angle (a) so that it leaves the eye perpendicular to the face of the contact lens. 3‑16, 3‑17 Goldmann three-mirror lens. The shortest mirror is for examining the angle.
What is a Volk lens?
The Digital 1.0x Imaging Volk Lens is a Slit Lamp Lens, Ideal for slit lamp photography. The Digital 1.0x Imaging Lens is optimized for the visible spectrum and was designed to reduce glare and reflections during general diagnosis and slit lamp imaging.
What is the power of Hruby lens?
Attachment to the microscope is also of advantage with the Hruby lens. The concave contact lens of 64 dioptres is best suited for detailed examination of vitreous and fundus and for measurements.
What is a 78D lens?
The 78D Non Contact Slit Lamp Lens is intended for general diagnosis and laser treatment, featuring patented double aspheric glass optics that provides excellent imaging of the fundus with balanced magnification to view the optic disc and macula. Patented double aspheric glass optics provide enhanced imaging.