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Zeiss i-Profiler

zeiss examination refraction iprofiler

The Zeiss I-Profiler; Objective Eye Optics Measuring Technology

i.Profilerplus® from ZEISS combines an auto refractometer, wavefront aberrometer, corneal topographer and keratometer in one fully automated device that measures in less than 30 seconds.

The instrument gives a

  • Precise profile of the eyes optics – comparable with a fingerprint: the data calculated may be transferred to the customized ZEISS lens with an accuracy of up to 1/100 D.
  • Comfortable, fast and precise measurement of the optical integrity of the eye
  • i.Profilerplus® lets you take advantage of i.Scription® technology, which in some cases may improve visual acuity with glasses in visually challenging environments.

The result: customized spectacles with i.Scription®technology for improved color and contrast vision as well as better vision at night.

Wavefront Technology

The technology of wavefront measurement of High Order Aberrations (HOA) of the eye enables a truer representation of the eye’s optical integrity, where a measurement and quantification of many known optical imperfections (aberrations) are possible. This new area of work is often referred to as ‘‘wavefront technology’’, since rather than the monochromatic aberrations being described in terms of the failure of rays to converge to the expected Gaussian image points, they are specified in terms of the deformations of the corresponding image wavefronts. The field involves a number of different areas:

  • The development of appropriate devices (aberrometer) to measure the aberrations.
  • The use of these measurements in relation to the design and selection of the optimal type of correction for both sphero-cylindrical errors and the aberrations. The possible corrective devices obviously include contact lenses.
  • The use of aberration measurements to assist in the diagnosis and measurement of the progress of eye diseases. such as the various corneal disorders like keratoconus as well as other disorders affecting the optical integrity of the eye; cataract, post-refractive and other eye surgery complications.
  • The use of aberration measurements in conjunction with adaptive optics to allow greatly improved visualization of the fundus in new types of ophthalmoscope.

The generation of the HOA profile of the eye is performed by the I profiler aberrometer through measurement of the optical paths of light rays traveling back from the retina through the pupil via 1000 microlenses of the aberrometer generating a map that represents the optical status of the entire pupil area (see picture below), the system is so accurate that is able to depit small changes in the optical status of the eye during different times after blink as represented in the picture below.

Waveront HOA measurement

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