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• It automatically measures binocular refraction, pupil distance, pupil size, direction of
gaze, and fixation abnormalities.
7.2 Main Applications
• Refraction of infants and children from 2 months of age, seniors, impaired and non-
cooperative patients.
• Early detection and documentation of multiple amblyogenic factors.
• Un-aided binocular refraction of all other patients
• Over-refraction of glasses or contact lenses.
• OPTIONAL (APPs)
• Phoria/tropia measurements
• Dynamic pupil response time and size caused by artificial light created by
2WIN
• Centering of the visual axis on the glasses frame
• Addition power measurement at the 66 cm distance from the patient
7.3 Exam conditions
• With reference to electromagnetic compatibility, the device is designed for use in a
Professional healthcare facility environment.
• The patient shall sit comfortably in a suitable exam room; infants should sit in adult’s
lap. A uniform dim light environment is necessary, except in presence of the
KALEIDOS accessory.
• The 2WIN accuracy is affected by external sources of light in particular HOT lights
halogen or incandescent lamps because of the presence of high infrared content of
the light; please make sure no direct light hits the patient’s face and ensure uniform
light on both eyes.
• A stable measurement distance of 1 meter is also important.
7.4 Exam procedure
• Turn the 2WIN ON by pressing the ON/OFF button for 1 sec. and wait until the stand-
by screen appears. A beep sound stands for 2WIN turning ON.
• Please take care to modify the patient age before saving the 2WIN measurement.
The 2WIN results in young patient with hyperopia error can be dependant to the
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