There is no scientific evidence to support the claim that applying kajal (also known as kohl or surma) in the early stages of childhood leads to an increase in the size of the child's eyes. The size of a person's eyes is primarily determined by their genetics and not by the application of cosmetics or any external substances.
Kajal is a traditional cosmetic product that has been used in many cultures for various reasons, such as cultural or religious practices, believed medicinal benefits, or as an aesthetic enhancer. However, its application does not alter the physical size of the eyes.
It is essential to be cautious when using any cosmetic product around the eyes, especially for young children, as their eyes are delicate and sensitive. Always ensure that any cosmetic product used around the eyes is safe, non-irritating, and approved for use in that area. If you have concerns about the safety of a particular product or its effects, it's best to consult with a healthcare professional or pediatrician.