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• If you wish to refract infants, young children and any non-cooperative patients, you
can turn the audible and/or the visible fixation targets ON. Audio fixation (attraction
system) is preferable to the visible small lights fixation.
• Make sure the Reliability Index of the refraction measurement is higher than 6 (max.
is 9). In case of Reliability Index of 6 or less a message with a hint will be displayed.
Please repeat the measurement, if possible.
• Over-refraction with contact lenses is as easy and accurate as without correction.
• For accurate over-refraction with glasses, please make sure that no stray light
reflexes disturb the pupil detection; should such reflexes be present, please slightly
tilt the glasses down.
• Please remember that free space, non-cycloplegic refraction can vary depending on
several conditions and parameters pertaining to the binocular visual function; in some
specific patients, including accommodating children, the 2WIN measurements may
vary.
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