It is true
that human’s eye can accept some limited range of light and create image on the
retina. But, there are many animals and birds who can see in the night clearly.
However, all countries have competed to develop their technology into different
ways which help to reduce human efforts with high speed and with good accuracy.
Some scientists are trying to solve all problem through the technology. Still,
many people have problems. This essay will discuss on different situations happening
in the night and their solution through the technology. This issue presented about
problems while people driving their cars and also give a solution by
establishing the night vision systematic cameras which are using specially for
military purpose now. According to National Safety Council Research, there are
three times greater risk of fatal accidents occurred in the dark night because
of fog light comes from opposite vehicles.
there are two separate modes of visual perception-day vision and night vision.
Some people like to drive cars in the night because the ration of selling
vehicles is increasing with innovating new technologies which create traffic
problem. Now-a-days, traffic problem is one of the big issue. But other people
argued that it has a risk to drive at night compare to day time because there
are many factors affected in driving cars at night. For example, when we drive
a car in the night and fog lights directly come from other car in our eyes
which create blindness for few minutes at that time we cannot see anything.
Sometime Light of our car focus on only few areas of the road so, we
concentrate only on that areas. We cannot know what is happening besides the
road. Moreover, we all know that ages and night vision capability is
vice-versa. Older people have widely seen these night vision problems because
of retina. Retina have two types of light sensing receptor cells called rods
and cones. The rods can only see black and white and the cones can see in
detail but only in bright light said Stephen Ryan (2012). They are not sensible
and powerful in older people. However, when light reflects from the object and enters
in our eyes than after it creates an image through retina and we can see it.
1) Stephen, R., Schachat, A., Hinton,
D., Sadda, S., Wiedemann, P., Charles, W.(2012). Retina (pp. 325-330). Retrieved from
Presbyopia – This is a condition when you have difficulties focusing on some
objects that are close to your eyes. Mostly this problem occurs in the age of
Myopia – Also called Nearsightedness,
which is a condition when you can clearly see objects that are located close to
your eyes, while the objects far from your eyes will appear blurry.
Hyperopia – Also called Farsightedness, which is a contrary to Myopia. The
objects far away can be seen clearly, while closer objects will appear blurry.
Astigmatism – This is a condition when images appear blurry and stretched out,
because the light doesn’t focus evenly on your retina.
Cataracts – Cataracts are commonly found among elderly people. The most
noticeable symptom is cloudiness over the eye lens. Some other symptoms
including sensitivity to glare, halos around lights, and poor nighttime vision.
Glaucoma – This condition can happen gradually or suddenly, which requires
a medical emergency procedure. The symptoms including increased pressure in the
eye, which is actually painless. When you experience such pressure, your vision
is not really affected at first, but overtime you could develop blind spots,
poor night vision, and even vision loss.
Macular Degeneration – This is the most common cause for vision loss in people over the
age of 60. The symptoms are faded colors, distorted vision, blurred vision, and
loss of central vision.
Floaters – These are tiny particles that are drifting inside the eye, which
can be very disturbing.
Retinal Detachment – Sometimes it’s misdiagnosed as floaters, but it also has other
symptoms including flashes of light in your vision, and a sensation of a
curtain-like shape hanging across part of your visual field.
Optic Neuritis – Usually resulting from multiple sclerosis or inflammation of the
optic nerve, this may cause you some pain.