Contact Lenses

Contact Lens Guide  

Wearing contact lenses is an interesting and enjoyable process. Not only does it eliminate the burden of wearing glasses but it also adds a special elegant appearance.

As contact lenses, whether medical or cosmetic (colored) is a medical device, it should be used only under medical supervision, because the lens is placed inside the eye and can lead to some medical problems such as inflammation and microbial infection, if you do not follow the proper instruction.

How do I choose my contact lenses?
This task is an ophthalmologist’s responsibility where he: -
1) Measures the acuity of vision and the power of the lens by a device called (Auto Ref.)
2) Measures the convexity of the Cornea by a device called (Keratometer) and determines the convexity and diameter of the lens.
3) Examines the percentage of moisture or dry eye by a device (Slit-lamp) and thus determines the ideal lens for each eye.
4) Excludes any medical contraindication for Contact lens wear.

How lenses work?! And their types?!

Contact lenses are disk-loving water floats on the surface of the cornea and act as a medical lens designed to collect light on the retina, but as it is closer to the cornea it provide a full field of vision, unlike glasses where you cannot see well at the edge of the glasses lens.

Contact lenses can be divided into two types: -

A – Rigid Gas Permeable lenses (RGP):
 These hard lenses are used in many cases, including Keratoconus and irregular Astigmatism and less common than soft lenses.

B - Soft lenses:
These include transparent and colored lenses and can be divided into: -

1 - Traditional lenses:
A lens, which comes in glass bottle and can be used throughout the year in the case of good care, usually more expensive and has become less commonly used now.

2 - Temporary or disposable lenses:
Mean that you can use a pair of lenses for specific periods and replace them after a short period of time with a new sterile pair  , including the lens-to-use one-day (Daily Disposable) or for a period of two weeks or one month or three months (Planned Replacement) and usually come in plastic cases. It is scientifically proven that changing lenses on a regular basis means more comfort and health of the eyes especially for people with excessive proteins formation on the lenses which may cause allergies and other problems associated with contact lens wear, and therefore preferred by most doctors than traditional lenses.

3 - Colored contact lenses:
Lenses are dark with a transparent center to change eye color which is available in several colors.

4 – Lenses for Astigmatism:
A specially designed lenses that correct astigmatism in the desired axis with some factors to prevent rotation of the lens on the cornea and maintain a particular axis which is compatible with the axis of Astigmatism to be corrected.

5 – Multifocal Lenses:
Is a special kind of lens for those over the age of Forty to allow vision at all distances (near, intermediate and far vision).

6 – Silicon Hydrogel lenses:
The latest technology in Contact lens material made of silicon that allow the passage of required oxygen needed by the cornea for healthy contact lens wear and also FDA approved for over-night wear (wearing the lenses while sleeping) as per the doctor’s instructions.

How to use contact lenses? And contact lens Care?

A - Dealing with lenses:
Hygiene is the most important factor for taking care of your lenses so: -
• You must wash your hands thoroughly before handling the lens
• Hands should not be contaminated by any cosmetics or creams, or perfumes
• Must refine and shorten your long or sharp nails
• Should not move or remove the lens from the case with sharp tool.
• Before wearing the lens you should make sure they are not upside down.

B - Lens wear:
Hands can be used together to wear lenses in front of the mirror quickly and easily: -
Using the left hand: raise the upper eyelid by the index or middle finger.
Using the right hand: the lens is placed on the index finger, pull down the lower eyelid by middle finger, Put the lens on the white part of the eye and move toward the cornea to stabilize the lens on the cornea, the eye closes several times until clear vision.

C - Take off the lens:

- Pull the eyelid down by middle finger.
- By the index finger move the lens toward the white part of the eye.
- Hold the lens between the thumb and index finger while avoiding folding the lens too much.

D – Lens Care:

To maintain the integrity of the lenses and lens performance for as long as possible and also to keep your eye healthy and avoid any health problems that may be caused by the lens, it is necessary to follow the instructions very carefully given by the physician when you buy new lenses.

Should Do:
- Wash hands thoroughly before handling the lens.
- Follow the instructions carefully for storing the lens.
- Use only prescribed solutions by your doctor to wash, clean, and store your lenses.
- Contact your doctor immediately in the event of any pain, redness or blurred vision.

Should not Do:

- Wear scratched or broken lenses as they can cause severe damage to the cornea.
- Use makeup before wearing the lenses, but after wearing the lenses and should avoid these cosmetic products entering into the eye.
- Put the lenses in your mouth or the use oral saliva to clean the lenses as the mouth contains several types of harmful microbes that can cause serious eye infections. Instead you should always use solutions and specialized products to clean the lenses.
- Clean the lenses using ordinary water as it contains some of the microbes, salts and chemicals (such as chlorine) that may harm the lens and the eye.
- Allow any other person to use or test the lenses.

Important note: -
You should also clean the lens box and replace it from time to time.

When the lens becomes a problem! : -
Examining the eye twice a day (once when you wake up and once at bedtime) is one of the important ways to ensure the efficiency of contact lenses and the prevention of any trouble as noticing the issue is the first step in treatment. Some side effects of the lenses can be simple and unclear, therefore, the regular inspection of the state of your eyes may help early detection of any deficiency in the performance of lenses or eyes, and therefore contact lens users should ask themselves these questions every day:
- Are my eyes feeling normal today?
- Can I see well today?
- Do my eyes look normal today?
If you are skeptical of anything you should see an eye doctor.

* The most important five symptoms must be observed every day?

• Redness:
Redness of the eye indicates the irritation and inflammation, you may not feel it unless you look in the mirror. Therefore, the comparison must be between the eyes, if the redness was in one more than the other, it indicates a problem requiring an immediate examination.

• Excess secretions
Whether with or without pain, it’s harmful.

• Sensitivity to light:

At first, most users of the lens suffer from sensitivity to light... They may need to wear sunglasses more than normal, but if you notice an excessive sensitivity of the light or the sensitivity in one eye, go immediately to the eye doctor.

• Discomfort:
Should never be ignored as it may be caused by the presence of a foreign body or dust under the lens. Remove your lens, wash it with lens care solution then re-insert your lens back. If this continues you should contact your doctor.

• Vision:

If you notice any decrease in your vision you should contact your doctor.

A perfect contact lens should see good, look good, feel good.