The most important terms about the Plusoptix devices

Baseline refraction:

What is a baseline refraction?

In the context of an entry examination a quick assessment of a patient’s refraction by means of a Plusoptix Binocular Autorefractor measurement is helpful. Plusoptix devices are designed to be used in undilated pupils in order to save time. As a consequence, all measurements of hyperopia are likely to be under estimated due to accommodation. However, measurements of myopia, astigmatism, axis, anisometropia and gaze asymmetry are accurate due to the fact that both eyes are measured simultaneously from a distance of 1 meter (3.3 feet) away. A refraction measurement in un-dilated pupils will provide you with a baseline refraction as a starting point for your cycloplegic retinoscopy. A baseline refraction must not be used for the prescription of glasses or contact lenses.


Can Plusoptix Vision Screening devices be used in adults?

Children may have a vision disorder that causes Amblyopia. According to the National Eye Institute, Amblyopia is the leading cause of monocular vision loss in children. Amblyopia is no longer a risk in a fully developed adult eye. Therefore it is crucial that children are screened for vision disorders. Plusoptix Vision Screening devices may be used in adults. However, the leading cause of vision loss in adults is Glaucoma. Glaucoma is an eye disease that you can’t detect with any device that is taking refractive readings. This is why Plusoptix doesn’t market its vision screening devices for adults.


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Statement of the Jury:
“The friendly appearance of this auto refractometer instils trust and encourages children to get involved in the examination in a playful way.”

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Statement of the Jury:
“A lovely tool that takes focuses not only on technology and ergonomics in its design, but also the needs of the child being treated. This makes the examination a more pleasant experience for everyone involved.”


Can a Plusoptix Binocular autorefractor be used in adults?

Yes, but due to the measurement technology you need to be aware of the following limitations:

  • pupil diameter needs to be between 4 and 8mm
  • media need to be clear (devices will not work in pre or post Cataract surgery patients)
  • measurement range is limited from -7.00 dpt to +5.00 dpt in spherical equivalents
  • Patients with Presbyopia will be overplused by 1,00 dpt for them not accommodating

On the other hand you will be able to obtain refraction measurements in both eyes simultaneously from 1 meter (3.3 feet) away in 0.5 seconds.