What is Visioffice?
Visioffice is the first and only universal measuring system that allows you to obtain every possible parameter needed for today’s individualized lenses.
What is Visioffice 2 Essilor?
Visioffice 2 is the digital dispensing system to best support your practice’s evolving dispensary needs. Supported from installation day with in-office training by an experienced technician, Visioffice 2 also features live phone assistance with our dedicated team of support staff.
What is Head cape?
The Head Cape is the measured angle of the patient’s Natural Head Posture (NHP). When asked to look straight ahead, if the patient slightly rotates their head to the left or right while focusing forward, this is their Head Cape.
What is eye rotation center?
When the eye rotates in its orbit, there is a point within the eyeball that is more or less fixed relative to the orbit. This is the centre of rotation of the eye. In reality, the centre of rotation is constantly shifting but by a small amount.
What is ERC distance?
In the present study we define the normal vertex distance as 12 mm, which provides us with a total distance from the center of eye rotation (ERC) to the back surface of the spectacle lens to be 13,5 mm + 12 mm = 25,5 mm. This standard will be used in the following analysis of the clinical data.
What is Angle Kappa and Alpha?
Angle kappa, more recently referred to as chord length µ, is the distance between the pupil center and the visual axis. Angle alpha is the difference between the center of the limbus and the visual axis (Figure 1).
What is minimum fitting height on Varifocals?
Measure fitting height Measure from the center pupil’s markings to the deepest portion of the lens. The minimum fitting height of Novel is 16.5 mm. The minimum fitting height of Novella is 14mm. The minimum fitting height of Narrative will vary based on ‘B measurement’ (14/16.5mm).
What is the significance of angle Kappa?
Angle kappa is the difference between the pupillary and visual axis. This measurement is of paramount consideration in refractive surgery, as proper centration is required for optimal results. Angle kappa may contribute to MFIOL decentration and its resultant photic phenomena.
What is Chang Waring chord?
In other literature angle kappa has been called angle lambda and, more recently, CW (Chang-Waring) chord (Figure 2). CW chord refers specifically to the angle between the subject-fixated coaxially sighted corneal light reflex to the pupil center.
What size lens is best for progressive?
Progressive, no-line bi-focal, lenses need to have an absolute minimum of 28mm height, but here again we recommend at least 32mm or higher lens for a more comfortable viewing area.
What is normal angle Kappa?
Angle kappa is the distance between the center of the pupil and the light reflex. The vertex normal or the light reflex is near the visual axis at the corneal plane. Angle kappa can be measured with a synoptophore or using the Orbscan II (Bausch + Lomb). The average angle kappa is about ±5°.
What is angle Kappa and Alpha?
What is Kappa angle?
Angle kappa is defined as the angle between the visual axis (line connecting the fixation point with the fovea) and the pupillary axis (line that perpendicularly passes through the entrance pupil and the center of curvature of the cornea).
What is angle Lambda?
The line from the center of the entrance pupil to a point on the cornea with a perpendicular tangent is called the pupillary axis. This axis forms an angle with the line of sight which is called the angle λ.
What is the ideal angle for Pantoscopic tilt?
For every millimeter the pupil is positioned above the optical center of the lens approximately two degrees of pantoscopic angle should be applied to the front. Ideally, for good cosmetics, there should be approximately 8 – 10 degrees of pantoscopic angle for most frames.