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Real-time observations on human corneal nerves and wound healing after excimer laser photorefractive keratectomy by laser scanning confocal microscopy technology (CAT#: STEM-MIT-0152-LJX)

Introduction

Excimer laser is a kind of invisible "cold laser" produced by fluorine argon gas under excitation. Excimer laser surgery is a high-tech means to treat myopia, which is a very successful corneal refractive surgery. Its principle is to use the excimer laser beam accurately controlled by the computer to open the chemical bond of tissue molecules through the energy of laser photons, so that the tissue can be gasified to play a cutting role. This surgery can change the curvature of the cornea, reshape the curvature of the cornea, flatten the curvature, and focus light on the retina, enabling accurate imaging of external light within the fundus, thereby achieving the treatment of myopia, hyperopia, and astigmatism.




Principle

Laser scanning confocal microscope is a high-tech microscope. It is based on fluorescence microscope imaging and equipped with a laser scanning device, which uses ultraviolet or visible light to excite the fluorescence probe, thereby obtaining fluorescence images of the internal microstructure of cells or tissues.
The laser beam is used as the light source in the laser scanning confocal microscope. The laser beam passes through the illuminating pinhole and is reflected to the objective lens through the spectroscope. The laser beam is focused on the sample, and every point on the focal plane of the specimen is scanned. If there is a fluorescent substance that can be excited in the tissue sample, the fluorescence emitted after excitation is directly reversed back to the spectroscope through the original incident light path, and is first focused when passing through the detection pinhole. The focused light is detected and collected by the photomultiplier tube (PMT), and the signal is sent to the computer, and the image is displayed on the computer monitor after processing.

Applications

Imaging and analysis in the fields of morphology, molecular cell biology, neuroscience, pharmacology, genetics

Procedure

1. Sampling
2. Preparation of slices
3. Staining (Select according to the specific experimental situation)
4. Observation

Materials

• Sample Type:
Human corneal nerves

Notes

Operate in strict accordance with the operating procedures, and shall not arbitrarily change the operating procedures
In the starting sequence of the switch and in the scanning process, try to do fast and orderly, to protect the laser