A scalpel is a very sharp knife used for surgery, anatomical dissection, and various arts and crafts. Scalpel may be disposable or re-usable. Re-usable scalpel has attached resharpenable blades or non-attached replaceable blades. Disposable scalpel has a plastic handle with an extensible blade and is used once, then the entire instrument discarded. Scalpel blade is made of high carbon steel.

Scanning confocal microscopes is a non-contact optical imaging profiler. The extremely high light efficiency of the illumination hardware and the high contrast algorithms are the main advantages of confocal arrangement, which make the system ideal for measuring steep slopes, rough and low reflective surfaces and samples containing dissimilar materials. It offers a very broad range of magnifications and numerical apertures.

Scanning Ophthalmoscope an instrument for retinal imaging in which the retina is scanned by a low-power laser and the reflected light is used to create a digital image. Basically ophthalmoscope is used for examining the interior of the eye. It sends a bright, narrow beam of light through the lens of the eye, and contains a perforated mirror and lenses through which the veterinarian can examine interior parts of the eye. It is helpful in detecting possible disorders of the eyes, as well as disorders of other organs that are reflected in the condition of the eyes