Table of Contents
How does a Volk lens work?
Basic Lens Theory Slit lamp lenses are high plus power condensing lenses which create in an inverted view of the fundus. These lenses are differentiated by their dioptric power and their aspheric shape, resulting in different fields of view, magnification, working distance, stereopsis, and small-pupil capability.
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 a Volk 90D?
The original Volk 90D lens started the slit lamp examination revolution! The 90D features a small 26mm diameter ring design which is outstanding for dynamic fundoscopy. Volk’s exclusive Double Aspheric optical design expands the usable viewing field beyond that of competitive designs.
Is Volk inverted?
The Volk lens is a positive lens and the aerial image is therefore inverted and laterally reversed and is located between the back of the lens and the slit lamp.
What is a Gonio lens?
Gonio lenses used for photo documentation are usually indirect lenses such as the three mirrored or four mirrored lenses, although other lenses may be used. These lenses provide visualization of the structures by neutralizing the refractive element of the cornea and giving an oblique view of the structures.
What is SuperField lens?
The SuperField NC® Slit Lamp Lens is an enhanced 90 dioptre lens intended for wide field, pan retinal examination, featuring high index glass which provides improved stereopsis and image clarity. High index glass provides improved stereopsis and image clarity.
How much is a Volk 90d lens?
Glass 90d Lens Volk, For Hyperopia, Rs 19000/piece Eye Care Products (Delhi) | ID: 19118731155.
What is the Zeiss 4 mirror gonioscopy lens?
Four mirrors angled at 62° help in viewing all quadrants of the anterior chamber without rotation. The small contact surface of 9 mm diameter makes the lens very convenient to use. It has a unique detachable handle.
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 trial frame?
n. An adjustable frame that holds trial lenses used during retinoscopy or refraction tests on the eye.