Silmälinja

Silmälinja refers to the line of sight or the visual axis. It is an imaginary line connecting the center of the pupil of an eye to a point in the external world. This concept is fundamental in optics, ophthalmology, and art. In ophthalmology, understanding the silmälinja is crucial for diagnosing and correcting vision problems, such as strabismus (crossed eyes) or amblyopia (lazy eye). It is also used in assessing visual acuity and determining the appropriate prescription for eyeglasses or contact lenses.

In geometry and art, the silmälinja can refer to the viewer's horizontal eye level within a depicted scene or a physical space. This line helps establish perspective and the relationship between the viewer and the artwork or environment. Artists often consider the viewer's silmälinja when composing a piece to ensure key elements are positioned at an optimal viewing height. Architects and designers also utilize this concept to create spaces that are comfortable and visually appealing for users. The precise angle and direction of the silmälinja are influenced by head and eye position.