The AL-Scan – the new optical biometry device
The axis length can be measured very precisely with the NIDEK AL-Scan. Keratometry, corneal diameter, corneal thickness, anterior chamber depth and pupil diameter are all determined within a few seconds with a single examination with automatic measurement triggering.
The IOL calculation by means of proven empirical IOL formulas, such as the Haigis, SRK / T or Hoffer Q-formula, can be carried out immediately after the measurement. For premium IOLs, a ray-tracing formula based on the Pentacam® topography of the front and back of the cornea is often advisable for IOL calculation. So it is e.g. in the case of toric IOL and in patients after refractive surgery, it is necessary to include the corneal surface in the calculation.
For this purpose, the axis length can be automatically exported to the Pentacam® and the calculation can be carried out by ray tracing based on the Pentacam® tomography.
For eyes with a highly mature cataract, the AL-Scan optionally offers an ultrasound probe (A-Scan), which is directly coupled to the optical biometric device.
The AL-Scan also sets new standards in terms of keratometry. Measurements are made on a 2.4 mm and 3.3 mm ring with 360 measuring points each.
CEM-530 – endothelial microscope
The CEM-530 is an endothelial microscope that performs a complete analysis of the corneal endothelium within two seconds.
After the extremely fast and simple measurement, the evaluation is completely automatic. In addition to the total number of cells in the measured area, the shape and size of the cells is taken into account. Here, the percentage of hexagonal cells and the coefficient of size deviation are determined. The determination of polymegativism and pleomorphism provides qualitative and quantitative information about the condition of the endothelium before cataract surgery. Besides the center of the cornea, the evaluation of the number, size and shape of the endothelial cells in the periphery is of high interest, e.g. at Cornea Guttata. The CEM-530 measures paracentrally next to the center at eight points and another six points in the periphery.
Refractometer, topograph, aberrometer and pupillometer – in the 3rd generation
The OPD-Scan III combines all necessary measurements to determine the refraction and the optical properties of the entire eye in one device.
The corneal topography of the corneal anterior surface is determined using a placido system. Based on this, the refractive effect can be assessed and abnormalities detected. Important in terms of the suitability of multifocal or aspherical IOL is also the determination of the photopic or scotopic pupil diameter.
With the OPD-Scan III, all prerequisites exist for assessing the optical quality of the eye pre-operatively and especially post-operatively. For example, post-operative wavefront aberrations and refraction data indicate decentration, tilt, or toric IOL rotation of the IOL.
In the iris image, the main sections of the keratometry are displayed and the corneal diameter is determined automatically.
A freely positionable pointer can be set to significant scleral vessels, which the cataract surgeon uses to position the toric IOL.
Retroillumination also allows post-operative control of the correct location of the toric IOL.
Device network by IOL station
Daily work in the clinic or practice becomes even more efficient with the help of IOL Station Software. All three of the described Nidek devices can be connected to this software. The software IOL Station combines all results and presents them clearly. In practice, optical biometry, topography, wavefront and endothelial cell evaluation are combined in one software for the first time.
The Pentacam® is today an indispensable tool in the suitability testing, evaluation, indication and postoperative follow-up of all refractive procedures. The Patients ‘Rights Act, which has been in force since February 2013, strengthens patients’ rights in case of treatment errors and expands patient information. The doctor has to prove that he has acted according to the latest medical standards. If a patient complains z. B. that he looks after an operation on the optical system worse than before, because z. If, for example, an astigmatism is present that he did not previously have, then the Pentacam® can objectively prove with the presentation of “Compare 2 examinations” whether this is true or not!