In the context of dental treatments and other applications like surface coatings and 3D printing, the use of light to transform deformable resins into rigid materials is well-known. Similarly, in biomedical applications, photostimulation is used to modify the mechanical properties of hydrogels. Natural hydrogels have been chemically modified to allow precise control over their viscoelastic properties through light exposure. These photosensitive hydrogels can transition from a liquid to a gel state with varying levels of firmness based on formulation, light intensity, and exposure time. Matching the viscoelasticity of the hydrogel to the target organ is crucial in tissue engineering and regenerative medicine.