[91031] in Discussion of MIT-community interests
Problem viewing far things in night? use it
daemon@ATHENA.MIT.EDU (Ashton Wise)
Mon Oct 31 09:05:52 2016
Date: Mon, 31 Oct 2016 09:03:18 -0400
To: mit-talk-mtg@charon.mit.edu
From: Ashton Wise <ashtonwise@beyesterday.top>
Reply-to: Ashton Wise <ashtonwise@beyesterday.top>
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NATIONAL EYE INSTITUTE NEWS
Gain Perfect Vision in
5 days
Go from a minus 7 to clear eyes by adding these
drops into your eyes
Get Crystal clear vision without any corrective
lenses
Fox News Exclusive- Full video
REPORT
Learn the 3 Minute trick to restore your vision to
20/20.
Watch the Video that reveals Eye care industry secret
Visual Acuity, Eyesight and Vision: What's the Difference?
Visual acuity. This, literally, is the sharpness of your vision. Visual acuity is measured by your ability to identify letters or numbers on a standardized eye chart from a specific viewing distance.
Eye chart, with young girl covering one eye.
Visual acuity is tested one eye at a time, with the help of a standardized Snellen eye chart.
Visual acuity is a static measurement, meaning you are sitting still during the testing and the letters or numbers you are viewing also are stationary.
Visual acuity also is tested under high contrast conditions — typically, the letters or numbers on the eye chart are black, and the background of the chart is white.
Although visual acuity testing is very useful to determine the relative clarity of your eyesight in standardized conditions, it isn't predictive of the quality of your vision in all situations. For example, it can't predict how well you would see:
Objects that are similar in brightness to their background
Colored objects
Moving objects
Three major physical and neurological factors determine visual acuity:
How accurately the cornea and lens of the eye focus light onto the reti
The sensitivity of the nerves in the retina and vision centers in the brain
The ability of the brain to interpret information received from the eyes
Only light that is focused on a very small and highly sensitive portion of the central retina (called the macula) influences visual acuity measurements obtained during an eye exam.
Visual acuity typically is quantified with Snellen fractions (see "What is 20/20 Vision?" below).
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<p>Go from a minus 7 to clear eyes by adding these
drops into your eyes<br />
<a href=
"http://www.beyesterday.top/0s10f2c1s4s27ds74bs4fc8s12bfs4s115f18">
Get Crystal clear vision without any corrective
lenses</a></p>
</td>
</tr>
<tr>
<td align="center"><a href=
"http://www.beyesterday.top/0s10f2c1s4s27ds74bs4fc8s12bfs4s115f18"
target="_blank" style=
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class="mobile-button">Fox News Exclusive- Full video
REPORT</a></td>
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Learn the 3 Minute trick to restore your vision to
20/20.<br />
Watch the Video that reveals Eye care industry secret
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<p class="footer" style=
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Visual acuity. This, literally, is the sharpness of your vision. Visual acuity is measured by your ability to identify letters or numbers on a standardized eye chart from a specific viewing distance.
</p>
<p class="footer" style=
"box-sizing:border-box;margin-top: default;columns:auto;margin-right: 0.7813px;padding-bottom: 4.595908px !important;border-left-style:none;border-image-outset: 0px;padding-right: 2px !important;margin-bottom: inherit;word-wrap:break-word;padding-top: inherit;border-collapse:separate;border-image-outset:0px;margin-left: 0.95px;font-weight:normal;direction:ltr;vertical-align: auto;margin-bottom: 0.5616214px;cursor: default;padding-top: 0.23px;margin-top: 0.01px !important;background-color: rgb(13,28,37);font-family: Futura,'Trebuchet MS',Arial,sans-serif;padding-left: 4px;font-size: 10.908px !important;vertical-align: baseline;width: auto;margin-top: none;">
Eye chart, with young girl covering one eye.
Visual acuity is tested one eye at a time, with the help of a standardized Snellen eye chart.
Visual acuity is a static measurement, meaning you are sitting still during the testing and the letters or numbers you are viewing also are stationary.
</p>
<p class="footer" style=
"box-sizing:border-box;margin-top: default;columns:auto;margin-right: 0.7813px;padding-bottom: 4.595908px !important;border-left-style:none;border-image-outset: 0px;padding-right: 2px !important;margin-bottom: inherit;word-wrap:break-word;padding-top: inherit;border-collapse:separate;border-image-outset:0px;margin-left: 0.95px;font-weight:normal;direction:ltr;vertical-align: auto;margin-bottom: 0.5616214px;cursor: default;padding-top: 0.23px;margin-top: 0.01px !important;background-color: rgb(13,28,37);font-family: Futura,'Trebuchet MS',Arial,sans-serif;padding-left: 4px;font-size: 10.908px !important;vertical-align: baseline;width: auto;margin-top: none;">
Visual acuity also is tested under high contrast conditions — typically, the letters or numbers on the eye chart are black, and the background of the chart is white.
Although visual acuity testing is very useful to determine the relative clarity of your eyesight in standardized conditions, it isn't predictive of the quality of your vision in all situations. For example, it can't predict how well you would see:
</p>
<p class="footer" style=
"box-sizing:border-box;margin-top: default;columns:auto;margin-right: 0.7813px;padding-bottom: 4.595908px !important;border-left-style:none;border-image-outset: 0px;padding-right: 2px !important;margin-bottom: inherit;word-wrap:break-word;padding-top: inherit;border-collapse:separate;border-image-outset:0px;margin-left: 0.95px;font-weight:normal;direction:ltr;vertical-align: auto;margin-bottom: 0.5616214px;cursor: default;padding-top: 0.23px;margin-top: 0.01px !important;background-color: rgb(13,28,37);font-family: Futura,'Trebuchet MS',Arial,sans-serif;padding-left: 4px;font-size: 10.908px !important;vertical-align: baseline;width: auto;margin-top: none;">
Objects that are similar in brightness to their background
Colored objects
Moving objects
Three major physical and neurological factors determine visual acuity:
How accurately the cornea and lens of the eye focus light onto the reti
</p>
<p class="footer" style=
"box-sizing:border-box;margin-top: default;columns:auto;margin-right: 0.7813px;padding-bottom: 4.595908px !important;border-left-style:none;border-image-outset: 0px;padding-right: 2px !important;margin-bottom: inherit;word-wrap:break-word;padding-top: inherit;border-collapse:separate;border-image-outset:0px;margin-left: 0.95px;font-weight:normal;direction:ltr;vertical-align: auto;margin-bottom: 0.5616214px;cursor: default;padding-top: 0.23px;margin-top: 0.01px !important;background-color: rgb(13,28,37);font-family: Futura,'Trebuchet MS',Arial,sans-serif;padding-left: 4px;font-size: 10.908px !important;vertical-align: baseline;width: auto;margin-top: none;">
The sensitivity of the nerves in the retina and vision centers in the brain
The ability of the brain to interpret information received from the eyes
Only light that is focused on a very small and highly sensitive portion of the central retina (called the macula) influences visual acuity measurements obtained during an eye exam.
Visual acuity typically is quantified with Snellen fractions (see "What is 20/20 Vision?" below).
</p>
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