👉 The Crawford fluid, also known as Crawford's solution, is a viscous, non-Newtonian fluid developed by Dr. John Crawford in the 1970s for use in ophthalmic procedures, particularly in cataract surgery. It is a complex mixture primarily composed of glycerol, sorbitol, and polyethylene glycol (PEG), with a small amount of water. This unique composition gives the fluid its distinctive properties: it exhibits shear-thinning behavior, meaning its viscosity decreases under shear stress, allowing it to flow easily during injection and then regain its thickness once the force is removed. This characteristic is crucial for minimally invasive surgeries, as it facilitates smooth insertion and precise manipulation within the eye. The Crawford fluid also demonstrates excellent biocompatibility, reducing the risk of adverse reactions and promoting better surgical outcomes.
