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(Music Plays)
In order to understand how we find the resolution of the human eye We must first have a basic understanding of
how the eye works. Vision begins when light rays are reflected
off an object and enter through the cornea, the transparent outer covering of the eye.
The cornea bends, or reflects, the rays that pass through a round hole called the pupil.
The iris, or colored portion of the eye that surrounds the pupil opens and closes, making
the pupil bigger or smaller, to regulate the amount of light passing through.
The light rays then pass through the lens, which actually changes shape so it can further
bend the rays and focus them on the retina on the back of
the eye. The retina is a thin layer of tissue at the
back of the eye that contains millions of tiny light sensing nerves called "Rods" and
"Cones". Which are named for their distinct shapes
Cones are concentrated in the center of the retina in an area called the Macula
In bright light conditions, Cones provide clear, sharp central vision and detect colors
and fine details. Rods are located outside the macula and extend
all the way to the outer edge of the retina. They provide peripheral or side vision.
Rods also allow eyes to detect motion and help us see in dim light and night time.
These cells in the retina convert the light into electronic impulses.
The optic nerve sends these impulses to the brain where image is produced.
Now let's take a look at Vision or Visual Acuity. Visual Acuity can be described as
the sharpness or acuteness at which an object can be perceived.
Let's take a look at vision numbers. For example, we will use twenty/ twenty.
The first twenty represents the distance between the object and it's viewer.
he next twenty represents the maximum distance at which an object's details can be seen.
Now that we know how the eye works and vision tests, we can begin to understand our resolution.
Resolution is described as the maximum number of pixels that can be displayed on a monitor,
expressed by the number of horizontal pixels by the number of vertical pixels.
We then take into consideration something called "Arc minutes" which basically measure
the amount of pixels that would be in our "picture" or our sight..
When we finish all of the calculations, we discover that the human eye is capable of
an average 576 megapixel image, With an approximate resolution of 31583.22
horizontal pixels, by 18047.56 vertical pixels at twenty twenty vision.
To put that in even more perspective, imagine thirty by twenty-five average sized HD TV's
stacked against one another.