Entoptic Phenomena: Unveiling the Mystery of Blue Field 'entoptic phenomena blue field'

For many people, the initial sight of Haidinger's brush can be challenging to grasp. This phenomenon is often described as a simulated appearance of a computer screen viewed through a polarizer, showcasing the typical size and intensity of Haidanger's brush.

As our eyes work, two different areas of the fovea can become sensitive to two different degrees of polarization. The macula's dichroism is believed to arise from some pigment molecules being arranged circularly, with only a small proportion responsible for the faintness of the phenomenon.

Xanthophyll pigments tend to be parallel to visual nerves that, due to the fovea's non-flat surface, are almost orthogonal in its central part but nearly parallel in its outer region. The size of the brush is consistent with the size of the macula, and as described by the Fresnel laws, the behavior and distribution of oblique rays in the cylindrical geometry of the foveal blue cones produce an extrinsic dichroism.

Haidanger's brush is often attributed to the dichroism of xanthophyll pigment found in the macula lutea. Interestingly, this phenomenon may also be seen by looking at a white area on many LCD flat panel computer screens due to the polarization effect of the display, which often results in a diagonal appearance.

Fainter bluish or purplish areas may be visible between the yellow brushes. The direction of light polarization is perpendicular to the yellow bar, with vertical orientation if the bar is horizontal. Typically, Haidanger's brush occupies roughly 3-5 degrees of vision, about twice or three times the width of one's thumb held at arm's length.

For those who can perceive polarization of light, Haidanger saw this phenomenon when looking through various minerals that polarized light. First described by Austrian physicist Wilhelm Karl von Haidanger in 1844, Haidanger's brush is an image produced by the eye, an entoptic phenomenon that varies with the orientation of the polarization of the light source.

This article highlights the fascinating world of entoptic phenomena and provides insight into the intriguing blue field phenomenon. By understanding how our eyes process light and polarization, we can better appreciate the intricacies of this phenomenon and its importance in the realm of human vision.

Entoptic phenomena blue field