Fitting & Verification
Soft Lens Verification

The methods which can be utilized for verification of soft lenses cannot be relied upon for complete accuracy. As a result there is a risk of premature rejection due to inaccurate or invalid test results. Therefore one method of verification is accomplished by simply inserting the lenses and inspecting them carefully once they are in the eyes. Any problems may be dealt with at this point.

Diameter: May be measured with a hand magnifier which allows the soft lens to contour itself to the magnifier.

Base Curve: Can be measured on templates of known radii of curvature. Can be measured on a Soft Lens Analyzer which can also be used to measure diameter center thickness, and provide close surface and edge inspection.

Power: Can be measured using a lensometer. A water cell may also be used to measure the power of a soft lens in the hydrated state. The soft lens is floated in normal saline and measured in a lensometer. The lensometer reading is multiplied by a factor of four. Not a reliable method since the power can vary with the thickness of the lens which varies from high plus to low minus.

Monocular Magnifier

Plastic Templates

Soft Lens Analyzer

Water Cell