The purpose of fixation is to preserve the original morphological structure of cells and tissues. The fixative can prevent the autolysis of endogenous lysosomal enzymes to their own tissues and cells and inhibit the growth of bacteria and molds. The internal structure of the protein is changed by coagulating and adding compounds， so that the enzyme is inactivated. The fixative changed the extracellular components of nucleus. The fixative is mainly divided into aldehyde fixative， mercury fixative， alcohol fixative， oxidant fixative， picric acid salt fixative and so on. Formalin in aldehydes and ethanol in alcohols are more commonly used.

The structure of the eye tissue is unique， with significant differences in the softness and hardness of the various layers of the eye wall， and poor connectivity between each layer. Tissue fixed with conventional fixative can easily cause deformation of the eye during subsequent dehydration， resulting in separation of the various layers of the eye wall structure， especially the retina， which is prone to detachment. In response to the structural characteristics of the eye， our company has specifically developed an eye fixative， which contains effective ingredients such as acetic acid， formaldehyde， anhydrous ethanol， and physiological saline. Therefore， it is also known as FAS eye fixative. The eye tissue structure fixed with the fixative is intact， without retinal detachment or fragmentation， and high-quality eye tissue slices are obtained. This reagent is only used in the field of scientific research and is not suitable for clinical diagnosis or other purposes.

 

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