What is the absence of pigment resulting in light or white splotches called?

The absence of pigment leading to light or white splotches on the skin is referred to as hypopigmentation. This condition occurs when there is a reduction in the production of melanin, which is the pigment responsible for the color of the skin, hair, and eyes. Hypopigmentation can be caused by a variety of factors including genetic conditions, certain skin diseases, scarring from injuries, or inflammation.

In contrast, hyperpigmentation refers to an excess of melanin, leading to darker patches on the skin. Astigmatism is an optical defect in the eye that affects vision and is unrelated to skin pigmentation. Dermatitis is a general term for skin inflammation, which can result in various symptoms but does not specifically denote a lack of pigment. Thus, the term hypopigmentation specifically identifies the condition of reduced melanin and directly describes the light or white splotches on the skin.