SwissLens | Toolbox

Lag of Accommodation

(measured in 33-40cm)

Measured Add

Add with relax

-

Lag of near fixation

(with Modified Thorington Cross, measured in 33-40 cm how much Add is needed to get a regular test image)

Measured Add to compensate the fixation disparity

Add with relax

-

We recommend Modified Thorington Cross to measure at near, If you don’t have, you can use the practical Near test APP from Smart Optometry App to measure the Near Lag of fixation with children.

Pupil size

(measured in room lighting)

Estimated diameter

Zoc with Relax

-

NightFlex Relax

Estimated diameter

Power Glasses (Sphere, with -cyl.)

Zoc with NightFlex Relax

-

Over-refraction calculation

Contact lens

Over-refraction

Results

Sphere

-

Cylinder

-

Axis

-

Stabil. (TABO)

Addition

-

Caution

This calculator is not compatible with ToriFlex and ToreliFlex lenses.

Eyeglass power conversion

Spectacles

Contact lens

Sphere

-

Cylinder

-

Vertex power

Corneal curve conversion

Base curve (dpt)

Tears index

Base curve (mm)

-

Sagittal height calculation

Curve flattening

Radius 0

Optical diameter (d0)

Zone 1

Radius

Diameter

Zone 2

Radius

Diameter

Zone 3

Radius

Diameter

Sagittal height

-

Last zone diameter corresponds to total contact lens diameter (ØTot)

Transposition Cyl+ / Cyl-

Sphere

-

Cylinder

-

Axis

-

Axe present / Axe with stabilisation

Refraction

Stabilization

Final axis

-

Power adjustment with BC changes on RGPs

Present BC

Present sphere

New BC

New sphere

-

Calculation of numeric eccentricity

Kreading (centre)

Horizontal

Vertical

Peripherial keratometry @ 30°

Superior

Inferior

Nasal

Temporal

Peripherial keratometry @ 30°

Superior

-

Inferior

-

Nasal

-

Temporal

-

Average eccentricity

-