The range of human vision is determined by the near point and far point of
the eye, which for a healthy eye is 25 cm and infinity, respectively,
allowing for clear sight from 25 cm to objects at any distance.
Additionally, humans can see a portion of the electromagnetic spectrum,
known as the visible light spectrum, which ranges from approximately 380 to
750 nanometers in wavelength. The field of view, or the extent of the
environment that can be seen at any given moment, for binocular vision is
about 190° horizontally and 100° vertically.
Near Point
The near point is the closest distance at which an object can be seen
clearly without straining the eye. For a normal, healthy human eye, this
distance is 25 cm.
Far Point
The far point is the furthest distance at which an object can be seen
clearly. For a normal eye, the far point is considered to be at infinity.
Visible Spectrum
The human eye can only perceive light within a specific range of the
electromagnetic spectrum, known as the visible spectrum. This visible light
spectrum ranges from violet light (around 380 nm) to red light (around 750
nm).
Field of View
The field of view refers to the area that the eye can perceive at one
time. For combined binocular vision (using both eyes), the horizontal
field of view is approximately 190°, while the vertical field of view is
around 100°. This area includes central vision and peripheral vision.
Other factors
Object brightness and size: Larger and brighter objects are easier to see
at greater distances, even if they are millions of miles away, like the
sun.
Elevation: Being at a higher elevation increases the distance to the
horizon, as seen from a skyscraper or airplane.
"The invisible reality" can refer to different concepts, from a
religious or spiritual realm beyond physical perception to the hidden,
underlying principles that shape our world, such as in quantum physics or
consciousness. It is a term used to describe things that are not seen with
the naked eye but are believed to have a profound influence on the visible
world, encompassing everything from divine grace to the nature of
consciousness, intuition, and even the underlying forces in the universe.
Religious and spiritual contexts
- *A spiritual world:*
In many religions, "invisible reality" refers to a spiritual or divine
world that exists alongside and beyond the physical world.
- *Faith and grace:*
This concept is often explored through faith, where believers are
encouraged to focus on the unseen reality of God's presence and grace,
which is not tangible but is considered to be the true source of salvation.
- *Quantum mechanics:*
In quantum physics, "invisible reality" can refer to the strange and
non-intuitive world of quantum mechanics, where things like particles and
waves behave in ways that are not visible to the naked eye, as seen in
experiments like the double-slit experiment, notes this YouTube video
<https://www.youtube.com/watch?v=IxRfDtaot5U>.
- *Consciousness and the mind:*
The term is also used to describe the hidden workings of the mind,
including consciousness, intuition, and dreams, which are all part of an
unseen reality that shapes our perception of the world.
Thus, vision through the mind is 360 degrees which the science
may not accept now. However the vision of 190degrees more than a straight
line is not ruled out and that to the distance of infinity. Why the hind
vision is lacking? The visibility cannot be in darkness. The vision is only
within the VIBGYOR of the dot or wave photons passing in front as hind
portion though photons are Passing through. still for the eyes it is an
area of darkness only.
K Rajaram IRS 141025
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