lately, while operating my phone especially at night, my vision just turn blurry suddenly (seeing double) , I asked people around me mostly doctor, they all say it's as a result of my too much pressing of phone and operating of laptop. to confirm it I did a research nd here is what I came up with and decide to share ...


Diagnosing the Cause of Blurred vision:


Blurred vision should never be ignored
because it can be a symptom of a
significant underlying condition. To find
the cause of your blurred vision, your eye
doctor may perform one or more of the
following tests:

Slit-lamp examination : To begin an eye
examination using a slit lamp, your eye
doctor will have you place your chin on a
resting pad. During the examination, your
eye doctor will use the machine to focus on
different structures in the front and back
of the eye to determine whether the eye is
functioning properly. If necessary, your
eye doctor may adjust the intensity of the
light and the level of magnification in
order to see better.
You will be given an anesthetic eye drop to
numb the surface of your eye for a slit-
lamp examination. You will also be given
an eye drop called fluorescein. Fluorescein
coats the surface of the eye and glows
under a blue light if anything abnormal is
present on the surface of the cornea.
Fluorescein is also used to measure the
intraocular pressure using Goldmann
Tonometry.

Refraction test: This test measures your
prescription for eyeglasses or contact
lenses. A device called a phoroptor or
refractor is used. Looking through the
device, you will be asked to focus on a
Snellen eye chart. As your eye doctor asks
you to read the chart, he or she will switch
lenses of different strengths in and out of
your view to determine whether you need
eyeglasses.

Tonometry : During a slit-lamp examination,
your eye doctor will check your eyes for
intraocular pressure. As mentioned above,
the anesthetic eye drops and fluorescein
allow your eye doctor to measure your eye
pressure. This is done with a device called
a tonometer, which is attached to the slit-
lamp. You will be asked to keep your eyes
wide open and to breathe normally. The
tonometer is brought up to the surface of
each eye to measure the pressure.
Sometimes eye doctors measure intraocular
pressure with a puff of air on the surface
of the eye.

Relieving Blurred Vision — It’s Possible

If you are experiencing blurred vision, you
should visit your eye doctor as soon as
possible. There may be a wide variety of
treatment options to choose from,
depending on the severity of your
condition. Here are a few things you can
do to try to bring your vision back into
focus.

Try reading glasses, which can be
prescribed or bought off the rack at your
local store. Sometimes buying off the rack
can be a low-cost solution. First, pick a
pair of the glasses with the lowest
magnifying power.

Stand at least a foot away from the rack to
see if you can read the letters on the signs.
If you cannot, switch to a higher
magnification. If regular reading glasses
are not the solution, you can try different
types of eyeglasses such as computer
glasses or bifocals, or you can also try
multifocal contact lenses.

It is important to know that both eyes do
not always lose vision at the same rate or
at the same time. You can try to trick your
brain by using two different contact lenses.
One lens can be for distance vision and the
other for near vision.

Wearing contacts in this fashion is called
monovision, or blended vision. Monovision
lenses allow the brain to automatically
focus the eyes for both distant and near
vision.

If your eye exam does not uncover any
problems, you may only need to try
lubricating drops to relieve dry eyes. Over-
the-counter drops are available, or your
doctor can write you a prescription. Again,
talk to your eye doctor about the
possibilities.

Finally, if you do wear glasses or contact
lenses, try cleaning them. Oil and debris
can build up on the lenses and cause
blurry or fuzzy vision. Many different
types of cleaning solutions can be
purchased over the counter, but it’s always
a good idea to talk with your eye-care
professional about the available options,
and which brands would better suit you.
Not all solutions work well with all types
of lenses.

For blurriness caused by cataracts, there
are surgical options to replace the old lens
with a new one

Can Blurry Vision Be Prevented?

In some cases blurry vision is inevitable. In
most cases, however, blurry vision can be
corrected or prevented. For example,
wearing sunglasses will decrease sensitivity
to light, which reduces the chance of
developing temporary blurry vision. Also
avoid drinking alcohol, which is known to
alter vision.

Regular eye examinations are extremely
important, especially if you are over the
age of 65, or if you have a health condition
such as diabetes or high blood pressure.
Use the following chart to see when you
should schedule your next visit.

Age Frequency
0 to 6 months Minimum of once a year
6 months to 18 years Every 2 – 4 years
19 to 39 years Every 3 – 5 years
40 to 64 years Every 2 – 4 years
65 and older Every 1 – 2 years
When to Contact Your Eye Doctor
about Blurred Vision
If blurred vision is accompanied by the
symptoms listed above, you should
consider contacting your eye doctor for a
check-up. If medication has caused the
blurry vision, do not discontinue or switch
medications before seeing your eye doctor.
If you are having eye pain and the eye is
red, call your eye doctor immediately.
Partial or complete blindness, even if it is
temporary, should never be ignored and
should be considered a medical emergency.

Talking to Your Eye Doctor

Here are some questions to ask your eye
doctor about blurry vision:

What is causing my blurry vision?
How soon should I come back for a
follow-up visit?

Which type of diagnostic tests should
I expect?

What do I need to do to prepare for
my next appointment?

Has my prescription changed since
my last visit?

Will I need to wear glasses on a
regular basis to prevent blurry vision?
Will I be able to drive myself home
today?
source: www.eyehealthweb.com/blurred-vision/