Since it was first introduced in the 80’s, the endothelial specular microscopy has been playing an essential role in the evaluation and improvement of ophthalmology protocols. NIDEK proposes its solutions for specular microscopy.
Specular microscopy is used to acquire data and images to perform the cornea assessment. Endothelial cells do not renew and the study of the corneal endothelium (counting of cells and cells quality) makes possible assessing the patient’s situation.
Specular microscopy is a type of examination of endothelial cells. This technique uses the specular reflexion resulting from the interface between the endothelial cells and the aqueous humour. Practically, today, the most frequently used technology is the contactless one, using a large-field specular microscope. Analysing the endothelium specular image consists in evaluating the appearance of cells covering this specific cornea layer to bring out anomalies such as drops or keratic precipitates.
Moreover the operator wants to count the number of endothelial cells in a defined zone while analysing the distribution of the cell sizes. Specular microscopy has been playing a major role in the study of endothelium morphology, and to quantify the endothelial damages produced by different surgery procedures and intraocular systems.
The specular microscope is a non-invasive imaging and analysis device of the corneal endothelial layer. The specular microscopy is an examination of endothelial cells using the specular reflexion resulting from the interface between endothelial cells and aqueous humour.
The specular microscopy can analyse different values, including cell density, size and shape. The technology is based upon a light projection on the cornea posterior face to capture the image reflected by the optical interface between the corneal endothelial layer and the aqueous humour. The image is then automatically analysed and displayed as a specific microphotography.
To enable a large investigation zone and a global observation of the cornea, many fixation points are added to central fixation to get images matching both paracentral and peripheral zones.
In clinical practice, specular microscopy if very often used to perform the endothelial examination of cornea. It is also widely used as a pre/post surgery detection system for the cataract surgery. The endothelial layer is examined for the surgery scheduling to prevent complications, such as post surgery corneal clouding.
Analysing the endothelium specular image consists in evaluating the appearance of cells covering this specific cornea layer to bring out anomalies such as drops or keratic precipitates. Very often, the operator has to count the number of cells in a defined area while analysing the distribution of the cell sizes.
Large investigation zone thanks to target points of central, paracentral and peripheral fixations.
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