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Contact LensGet rid of specs

  • Worn on the front surface of the eye contact lenses are small, thin optical lenses that rectify focusing aberrations in the eye. Refractive eye problems such as myopia, hypermetropia and astigmatism are corrected. Apart from replacing single focal lenses it can replace bifocal glasses or\and it can even enhance or change the eye color.


    - cosmetically good looking
    - do not fog up.
    - Decrease visual distortion that afflicts some glasses especially high power.
    - safe for sports.
    - Good peripheral field of vision is offered.


    - They require more care in handling and cleaning as compared to glasses
    - Eye infections may occur due to prolonged or unhygienic use of lenses.

    TYPES OF CONTACT LENSES Contact lenses are categorized as follows:

    1) Type of material used in the lens
    a. Soft contact lenses-so soft that you can fold easily without break- most commonly used.
    b. Rigid gas permeable (RGP) contact lenses- also known as semi soft contact lenses-porous so that gas can permeate through.
    c. Hard contact lenses-least used.
    2) Type of vision correction for which they are designed Spherical (for myopia or hypermetropia)- most commonly used Toric (for astigmatism) Bifocals (for presbyopia)
    3) Replacement Schedule
    Daily Wear Disposables-lenses are discarded after a short time like daily, weekly, fortnightly, monthly and 3 monthly-- these are not for constant use but are removed daily at sleeping hours. Many people think that weekly disposable means one can wear lenses constantly for a week - that is not true.
    4) Tints Cosmetic tints
    Visibility tints
    Soft Contact Lenses
    Soft contact lenses (also known as hydrophilic lenses) represent a wide variety of contact lenses available today. Nowadays, these lenses are very common and popular. Soft lenses can correct myopia, hyperopia, astigmatism . Soft contact lenses are very thin and cover the entire surface of the cornea. They are made from flexible plastics, which absorb water and thus allow greater amount of oxygen to pass.
    Through the lens to the cornea.

    Advantages and Disadvantages The advantages of soft contact lenses are:

    - They are more comfortable as compared to semi soft [RGP] or hard lenses.
    - New contact lens wearers find it easier to adapt to soft contact lenses.
    - They cannot be blinked out of the eyes.

    Following are the disadvantages of soft contact lenses:

    - They are less durable as compared to RGP lenses
    - They require greater care in handling.
    - Soft contact lenses can cause dryness in the eyes.
    - They are susceptible to protein deposits that reduce lens performance.

    INSERTION Inserting Soft Contact Lenses

    - Wash your hands thoroughly and don't allow them to dry.
    - Remove the lens from the case and make sure it is not torn .
    - Position the lens on the tip of the index finger of your right hand (left hand if left-handed).
    - Make sure the lens is right side out-more curved surface towards you.
    - Hold your upper eyelid with your left hand. Pull your lower lid downward with.

    - The middle finger of your right hand.
    - Look straight with both your eyes open and place the lens gently on the eye.
    - Release your lower eyelid first and then gradually release the upper eyelid.
    - look into the mirror for any distant object, if seen clearly then lens is on cornea.

    - REMOVAL Removing Soft Contact Lenses.
    - Wash your hands thoroughly and don't allow them to dry.
    - Hold your upper eyelid with your left hand.
    - Pull your lower lid downward with the middle finger of your right hand.

    - Use the index finger and thumb of your right hand to pinch the lens gently out of the eye.


    How to tell if your lens is right side out Right side up One way to tell if your lens is right side out is that when you hold the lens on the tip of your index finger at eye level, it should be bowl-shaped. Inside-out lens If the edges of the lens turn downward like an inverted umbrella, or like a saucer then the lens is inside out and must be reversed. You can usually tell if a lens is inside out by the way it feels on your eye. If it isn't comfortable and keeps moving when you blink, then the lens is fitted inside out. CLEANING How to clean soft contact lenses? Soft contact lenses are very delicate and hence proper care and handling of soft lenses is very important to avoid damaging them. There are three essential steps involved in the cleaning of soft contact lenses: cleaning, rinsing and disinfecting. Cleaniing rinsing and storage -- After removing the lens from the eye, clean it properly with a cleaning solution by gently rubbing the outer and inner surfaces to dislodge any deposit then rinse and finally keep in the container ,immersed in solution, othewise lens will be spoiled RGP LENSES --- RGPs are smaller and made out of a harder, less pliable material than soft contact lenses, which makes them less comfortable initially. RGP lenses can correct myopia, hyperopia and astigmatism. Advantages and Disadvantages

    The advantages of RGP lenses are:

    - They last longer as compared to soft lenses.
    - They are easier to handle and clean.
    - Chances of infecting the eyes are less with RGP lenses.
    - They are small and hence easy to insert.

    Disadvantages of RGP lenses are as follows :

    - They are less comfortable initially as compared to soft lenses. They require consistent wear to maintain adaptation.
    - They can slip off the eye more easily than soft lenses.

    INSERTION Inserting RGP Lenses.

    - Wash your hands properly and do not allow them to dry.
    - Take the lens out of the case and make sure it is clean.
    - Place the lens on the tip of the index finger of your right hand (left hand if you're left-handed) with the cup side of the lens up. Apply a few drops of wetting solution on the lens.
    - Using the middle finger of your right hand, gently pull down your lower eyelid.
    - Lift the upper lid with your left hand.
    - Look straight and place the lens gently on your eye.
    - Release your eyelids and shut the eye.

    REMOVAL Removing RGP Lenses

    - Wash your hands properly before removing the lens.
    - Stretch the outer corner of your lower lid with your finger.
    - Cup the other hand under your eye to catch the lens as it falls out when you blink.

    CLEANING How to clean your RGP lenses?

    Cleaning - Put a drop of cleaning solution on the concave surface of the lens and gently rub to remove deposits from the back of the lens.
    Rinsing - Rinse the lens with a rinsing solution before putting it back in the container.
    Disinfecting - After manually cleaning and rinsing, soak the lens in a disinfecting solution for several hours to remove the protein deposits.


    Classification of contact lenses based on their replacement schedule. Depending on their replacement schedule, contact lenses are classified as daily wear lenses and disposables. Daily Wear Contact Lenses Lenses prescribed for daily wear are to be worn only during waking hours; usually up to a maximum of 18 hours. Daily wear lenses are removed at night and cleaned and disinfected after each removal. Daily wear lenses may be soft or rigid lenses; with or without tints. Disposable Contact Lenses Disposable contact lenses are those which can be replaced every month, every 1-2 weeks or even daily; depending on your need and your eye care practitioner's recommendation. Except for daily disposables, disposable contact lenses require cleaning and disinfecting after every use period. Almost all disposable lenses are soft lenses. Maintenance is similar as daily wear. The advantage of disposable lenses is that they are thrown away before getting too dirty, which reduces the chance of eye infections. However, they usually turn out to be more expensive as compared to the daily wear lenses. TINTS Contact Lenses identified by tints Contact lenses may be clear or tinted. The categories of tinted contact lenses available are: Cosmetic Lenses Cosmetic enhancement tints are translucent and are designed to change your natural eye colour. They are available in various colours such as blue, green, grey,etc. When wearing these tints, the color of your eye is a blend of the lens tint and your natural eye color. This is the reason it is almost ineffective in Indian eyes except few blue or light colored eyes Cosmetic lenses are usually soft lenses. Handling Tints: Handling tints have no effect on eye colour. They are very pale; coloured just enough to make the contact lens visible while you are handling it.

    CONTACT LENS CARE -------------

    - Do not wear your contact lenses while sleeping; this practice increases the chance of infection to eye and damage to lens.
    - Always wash your hands thoroughly with a soap prior to handling your lens.
    - Always handle the same lens first to avoid accidentally switching your lenses.
    - Always check if your lens is inside out before insertion.
    - Clean, rinse and disinfect your lenses as recommended after every use.
    - Use fresh storage solution each time to store your lenses. Never reuse the solution.
    - Always keep your storage case clean.
    - Never store your lenses in fresh saline solution or tap water.
    - Only use the contact lens solutions that your eyecare specialist has recommended.
    - Never use anyone else's contact lens solutions and never use old or expired solutions.
    - Always remove your contact lenses if your eyes are excessively dry, red or irritated.
    - Never overwear your contact lenses. Follow all recommended wearing instructions.
    - Avoid swimming with your contact lenses on.
    - Never use saliva to moisten the lenses.
    - Try to remove your contact lenses for some time during your lunch break. This will add extra years of comfortable contact lens wear.