This category of polymers has the capability to deformation, which upon application of a stimulus, for example, heat and light, can turn these polymers to their original and previous shapes. A shape memory polymer has the capability to change from a temporary shape which can be achieved by efficiently deforming it with the use of a stimulus. It can also be returned to its previous share when it is not being performed by making it permanent. For this purpose, various stimuli can be used; however, until now, heat, light, irradiation with infrared light, immersion in water, and application of magnetic or electromagnetic field are being used. Shape memory polymers sometimes retain two or three shapes which can be transformed by reducing temperature. The electromagnetic field can also trigger the changes in shape memory polymer. SMPs have the capability of forming stable to biodegradable materials, which can be elastic or rigid, hard, or soft, which depends on the structural units. Because of its increased reactivity to temperature, light, moisture, and pH, it can be used for different materials in fabric. They may provide comfort, protection against environmental contaminants, smart control drug release, etc. SMPs can be potentially used for various medical applications. One of the recent applications includes orthopedic surgery; however, it is also being used for various ophthalmic devices, which include punctual plugs, glaucoma shunts, and intraocular lenses. It was first used in robotics, where SMPs provided initial soft pretension in gripping. SM foams can be hardened by cooling, making an adaptive shape grip. Because of its increased use, this material is widely used in the building industry, sportswear, and in certain cases used as thermochromic additives.