What is The Resolution of Human Eye? How Many Megapixels?

Resolution has been experiencing an outrageous climb since the early beginnings of analog TVs.  The newest embodiment is 4K displays. Technically human eye is 576 megapixels i.e. 90 degrees *60 arc-minutes*1/0.3*60*1/0.3= 324,000,000 pixels (324 megapixels).120*120*60/ (0.3*0.3) = 576 megapixels. The absolute human vision angle would necessitate more megapixels. This article is focusing the science behind the most phenomenal resolution device, the human eye. Being able to resolve lines that are separated by one sixtieth of a degree (an “arc minute”) is the goal when testing eyesight. This resolution is assessed by using an eye chart at a distance of 20 feet; hence this level of performance is defined as 20/20 vision. In the same way 20/50 explains that one can only determine factors with 20/20 vision from 50 feet apart.   Alternatively with a metric system these are all standardized approximately 6 meters and is considered as 6/6 vision in its place. Someone with good eyesight 20/20 vision is considered to be a rational capacity, but by no means is a limit. Amongst the full spectrum of visual capacities, each viewer fits in differently. Hale and hearty eyes of someone with glasses may actually resolve substantially extra. Visual capabilities necessitated for distinguishing text are usually much far above the ground than those required for perceiving additional detail.

Viewing angles rule the whole phenomena of human eye resolution. In photography, fine art prints uses the 300 pixels per inch, which for a person with 20/20 vision requires a sighting aloofness of one foot to resolve. However pixels always do not need to be packed this densely. With enlargements, the standard rule of thumb is that viewing these at aloofness alike the diagonal print dimension. Although these viewing angles are not probable or sensible always, they are more often than where someone stand for an immersive viewing experience. At the same angle of vision, being closer to a smaller screen could be a preference for one, but beyond a larger one. It is a consequent of the fact that this angle matches closely the 40-60 degree of the central angle of human eyes. Sealing this central angle viewer feels the sense of being inside the scene as opposite of looking inside a rectangle. To all intents and purposes sense of detail and precision is enhanced with higher resolution; higher resolution enhances the sense of detail, while sense of attendance is enhanced by wider viewing angles. The above two are needed mutually to enhance the sense of realism.

The key is that viewing angles increases along with the resolvable pixels either due to a larger image or a closer sighting aloofness. Pertaining same angles of vision to home cinema, displays with HD displays usually appear blurred and pixilated. 4K(3840×2160 called ultra high definition) needed to produce sharp and continuous pixels for the majority of viewers. With theatrical display, relative viewing distances are often little closer depending on which seats are selected. Into the peripheral vision of viewers aspect ratios of widescreen may also be intended to rise. In most-large screen theatres seats near the middle to rear create a 40-60 degree angle of view, but seats near the front can result in 90 degree or higher. However 4K content is only one of the several factors contributing to our perception of detail. Cameras, lenses and focusing technique all need to meet a higher standard.


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