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Colored Contacts for Astigmatism
1. Definition
2. Types/Characteristics of Astigmatism Colored Contacts
3. Ups/Downs of Astigmatism Colored Contacts
4. Corrective usage of Astigmatism Colored Contacts
5. Understanding Astigmatism Prescription
6. Usage of Astigmatism Colored Contacts
1.Definition:
What are Astigmatism Colored Contacts? They refer to aesthetic
lenses produced by adding colored pigments on the surface of astigmatism correction
contact lenses. These soft contacts produced in Korea, both serve aesthetic
and vision-correcting purposes. The contacts utilize natural pigments mostly,
and are only produced as soft lenses due to technological limitations.
The colors vary, ranging from blue, brown, grey, green, and to purple. The appeared
color when worn also varies by the innate color and density of the pigment of
the wearer's pupil. Thanks to its aesthetic function of making the eyes appear
bigger and clearer, the product has been widely popularized by many women.
http://www.queencontacts.com/category/Toric-color-contacts/60
The product, exported to all around the world as a necessity in young women's
fashion accessories, are produced solely upon custom orders that reflects individual
astigmatism levels of the customer. The line of product therefore display high
price, and is scarce in its variety of models to choose from compared to other
models of regular colored contacts. Still different design choices are avaialbe:
Natural color design, Exotic foreign color eye contacts etc.
The types include continuous wearable lenses that can be used for periods of
6 months to 1 year, and one-day lenses that must be replaced after usage for
once. However, due to its low rigid-gas permeation rate compared to normal vision
correction soft lenses or rigid-gas permeable lenses, Astigmatism colored contacts
have high probability of causing keratitis or corneal ulcer and must not be
worn by people who have xerophthalmia, or people who work in environment with
high temperature changes or exposure to harmful gases.
Manufacturing Astigmatism Colored Contacts involves taking both myopy and astigmatism
level into account. Therefore only with precise measurement of one's condition
from ophthalmologist can one have the perfect colored contacts produced. In
order to prevent the side effects from wearing colored contacts, one must purchase
the right lenses after having allergic reactions tested out from optical centers.
Moreover, contacts must be maintained with hygiene, with constant washing and
cleansing of remnant protein tissues. The time worn must not exceed 6 to 8 hours.
Nighblind people or overnight drivers must not wear colored contacts, since
the contacts may blur their sights during nights.
2. Types/Characteristics of Astigmatism Colored Contacts
Types: Astigmatism Colored Contacts come in various colors including brown,
black, grey, pink, and violet. Unlike normal colored contacts with various sizes,
the astigmatism colored contacts are only manufactured in standard 14.0mm size,
in order to minimize the movement of lense along the pupil and effectively correct
astigma.
Characteristics: Unlike normal colored contacts, astigmatism contacts are manufactured
strictly on custom orders. Since production involves knowing both myopia and
astigmatism levels for one contact lense, these products cannot be manufactured
in mass nor in advance. The production normally takes 1~2 weeks.
3. Ups/Downs of Astigmatism Colored Contacts
Ups
Astigmatism Colored Contacts exposes your beautiful eyes, maximizing the aesthetic
effect that unnatural eye-glasses cannot bring to you.
Improved vision in public spaces such as train stations or airport display boards
eradicates your unconscious habit of squinting your eyes.
Reduced fatigue of your eyes improves facial expressions.
Driving becomes happier thanks to enhanced visual discretion of lights during
nights.
Downs
The lenses feel a little thick when worn.
However, advanced technology of colored contacts production manufactures thinner
lenses that helps comfortable experience.
As soft lenses the products may cause blurry vision due to misalignment of axis
that arises from the contacts' dislocation within the eye.
Compared to regular colored contacts, they are expensive.
Since production involves knowing both myopia and astigmatism levels for one
contact lense, these products cannot be manufactured in mass and are only custom-produced.
The production requires complex technology so that it satisfies individual eye-specific
needs. The price range is therefore, higher, but recent advanced technology
allows for the prices to drop.
The consumer reviews of astigmatism colored contacts vary; some love the product,
while some are disappointed.
4. Corrective usage of Astigmatism Colored Contacts
Astigmatism-only contacts are designed to have correction rates in only one
direction. While glasses can fix the lenses steady above the eye thanks to its
frames, soft lenses cannot prevent the contacts from revolving along the pupil's
surface, and therefore has lower correctional effect compared to hard lesnes
or glasses.
For normal sighted people with uniform cornea shapes, the focus of light forms
an image at a concentrated point on the retina. Astigmatism refers to the condition
in which the rugby-ball shaped cornea fails to form an image at the designated
uniform point..
In order to fix such condition, small and firm hard lenses are very effective.
Tears fill up in the interior surface of the firmly-positioned contacts, and
naturally help the contacts shape the cornea's orientation.
On the other hand, soft lenses are big and flexible; the correctional effect
is low because the lenses constantly move along the pupil's surface. For severe
astigmatism, the unstable movement of the contacts may even worsen the overall
comfort of the wearer.
For aforementioned reasons, most astigmatism colored contacts are manufactured
in relatively small DIAs of 14.0mm and large Base Curve of 8.6mm in order to
minimize such side effects; Small DIA prevents rapid movement of contacts when
worn, and large base curve alleviates the pain on the eyes.
5. Understanding Astigmatism Prescription
What does -6.50 sph. -2.25 cyl x180 mean? Sph is a short term for spherical
that indicates spherical contacts: Contacts for myopia. The prescription indicates
that the patient has a diopter 6.50 myopia. In English, the patient will only
be able to form an image properly on his retina when he uses concave lens of
6.50 diopter. Cyl refers to cylindrical contacts, or more commonly, the astigmatism
lenses. The aforementioned prescription indicates that the level of astigmatism
is 2.25 diopter. Astigmatism is a symptom in which an image's focus differs
by the angle of the vision's orientation axis. The image's focus in 80 degree
axis and 180 degree axis are different. For the aforementioned prescription,
x180 indicates that the patient's vision will be enhanced by applying the 2.25
diopter astigmatism at 180 degree axis angle. The combination of myopia remedy
and astigmatism alleviation consists the prescription. When a patient cannot
reach the normal sight of 1.0 even using these remedies, he/she must be thoroughly
examined for other diseases. People with -2.0 diopter myopia can display unaided
visual acuity ranging from 0.4 to 0.1, but should have no problem attaining
1.0 with a 2.0 diopter myopia contacts.
6. Usage of Astigmatism Colored Contacts
Unlike regular colored contacts, Astigmatism Colored Contacts can secure clear
vision only when its worn with perfect alignment of its axis. Astigmatism is
a symptom in which an image's focus differs by the angle of the vision's orientation
axis. The image's focus in 80 degree axis and 180 degree axis are different.
Therefore, Astigmatism Colored Contacts mark the axis degree in production.
Only by choosing the right degree can the patients fully have their vision corrected.
Careless choices in degree levels may cause even more blurred vision when worn,
so people must always check the degree levels of the colored contacts.
Most astigmatism contact lenses display a sign of AX in one side of the contact.
Users must wear the contacts so that the AX sign locates downwards. For some
colored contacts without the axis sign, the thicker surface is where the axis
lies, and must wear the contacts so that the thicker side faces downward. For
those of you who are still confused about the orientation of the contact, blinking
several times after wearing the contacts would steadily pull the axis surface
downwards and clear your vision.
How to find axis
Important: wear so that the axis surface faces downward
Before wearing
1. Use a mirror to check if there is any congestion in your eyes
2. Trim your nails so that they are short and not pointy.
3. Wash your hands thoroughly with soap.
Checking your contacts
Before opening the seal, double-check if there are any damage to the wrappings
and container.
Do not open when you find damage.
Contact your merchant when you find anomalies.
Opening the Container
1. Check to see if one lens is located in the center of the container and examine
its colors or any damage.
2. The metallic part of container's cap displays arrow signs. Turn the cap to
the opposite direction of the arrow displayed and gently lift it up.
3. Open the seal as you turn the cap in one direction. Be careful not to cut
your hand.
4. Peel the rubber seal, and shake the container lightly so that the contact
can float. Use the lens after you pour some reservation liquid in the contact's
case.
5. When you have accidentally removed the cap, do not use force to peel the
seal but turn it to one direction using clippers.
Checking your lens
1. Take out your lens and check for distortion, discoloration, external contamination,
cracks and damage. Wearing defective product can be a cause for visionary disability
and one must never attempt to do it.
2. Put the lens on a fingertip to check whether the lens is in right direction.
Wearing overturned lenses will cause discomfort and unintended dislocation of
the contacts.
How to wear Contact lenses
1. Rinse the lens in saline water thoroughly.
2. Put the lens on index finger of your comfortable hand and check its shape.
It is easier to wear the lens when you remove water on the surface of contacts.
3. Use middle finger of the same hand to pull down the lower eyelid.
4. Use middle finger of the other hand to pull up the upper eyelid, exposing
your pupil.
5. With both eyes staring straight at the mirror, gently place your contact
on your pupil so that the axis of the lens faces downwards.
6. Check that the contact is lying correctly on your pupil and lift your finger
slowly.
7. Blink a few times slowly to check if the contacts are properly worn.
How to remove contacts
1. After washing your hands thoroughly with soap, look in the mirror to locate
the lens, and look up the mirror so that your pupils are facing up.
2. Use the middle finger of your comfortable hand to pull down the lower eyelid.
3. Hold the position and use your thumb and index finger to slightly grab the
lens and take it out. Be careful not to scratch your eye nor the lens with your
nails.
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