Device Comparisons

Name of Device

Advantages

Disadvantages

Diopsys ENFANT II

·      No dilation or sedation for maximum patient safety

·      Tests pre-verbal children as young as 6 months of age

·      Portable

·      Immediate analysis

·      Cumbersome process of attaching and standardizing electrodes

·      Time required for testing

·      Monotonous stimuli

·      Complexity of the generated waveforms

iScreen

·      Fast (less than 5 seconds)

·      High quality photograph

·      Remote image analysis

MTI Photoscreener

·      Portable

·      Polaroid output that is available for immediate interpretation

·      Analog output

·      Lack of support for current instruments

·      Lack of a financially solvent company

·      Requires trained personnel for image analysis

Nikon Retinomax

·      Handheld, easy to use

·      Can see on the screen the image of the child’s eye, the different refractive measurements with time and the relaxation of accommodation, which is not possible with the SureSight

·      Shorter working distance than the SureSight, children may be more alarmed by having autorefractor closer to face

·      Cannot detect strabismus

Plus Optix PediaVision SO8

·      Allows user-chosen, age-related, referral criteria

·      Fast (takes less than 5 seconds)

·      Infrared

·      Tests pre-verbal children as young as 6 months of age

·      Binocular, simultaneous measurements

·      Lack of validation studies comparing SO4 to other instruments

·      Validation of strabismus detection poor

Welch Allyn SureSight

·      Fast (less than 5 seconds)

·      No provider interpretation required

·      Minimal cooperation is necessary

·      Only two referral criteria available

·      Poor PPV with manufacturer’s criteria

·      Cannot detect strabismus