EYE HEALTH

'The mind is the eyesight of the soul'. What you perceive stimulates your emotions. It shapes your memories and provides the raw elements of your imagination.

The beauty is in the eye of the beholder.

After six months up to 1 year, depending on the eye care professional’s recommendations, a follow-up visit is required to check whether the defect has not changed.

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Overview

Contact lenses are practised to fix vision defects; using them as directed by an eye care professional is healthy. What’s more, they are convenient to use. It is essential not to choose contact lenses by yourself because they are placed right on the corner of the eye, which is a compassionate place.

Well-chosen lenses can be performed in adults, the elderly and even children; they pose no danger. Thanks to the available technology, an ophthalmologist and an optometrist can accurately determine the parameters, and choose the right type of contact lenses to correct most vision defects, taking into account the patient’s lifestyle. Thanks to this, the examined person will be active without any restrictions. During the visit, the patient will, among other things, be thoroughly guided in how to put on, take out and care for the lenses correctly.

This guide will help you understand:

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Learning Path

Myopia: The defect of sight which is manifested by blurred vision of objects distant from us. It usually develops in childhood and adolescence, it is often hereditary. The image is created before and not on the retina of the eye.

Hyperopia: The defect of sight when the light rays entering the eye focus behind the retina. It is caused by too short eyeball, manifested by worse vision at close range, it causes symptoms of fatigue, headaches and watery eyes.

Astigmatism: The defect of sight which is manifested by blurred vision of objects from close and far distance. It is most often inherited but can also be caused by eye injury. The curvature of the cornea of a person affected by astigmatism is imperfect, which means it takes an oval shape instead of a round one

Presbyopia: This is a natural process caused by the ageing of the lens in the eye, it affects people with both hyperopia and myopia. It is often observed after 40 years of age. It is characterised by deterioration of vision at close distances.

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Hard Lenses: These are specialist lenses individually designed for the patient. They are primarily used to correct complicated vision defects such as pellucid marginal degeneration, keratoconus, but also very high astigmatism. Their main advantage is that they maintain their original shape invariably, and thus improve the incorrect structure of the cornea, model its shape.

Soft Lenses: These lenses are made of soft, comfortable materials, characterised by high oxygen permeability. They can be sub-classified into two types:

Hydrogel: delicate, well hydrated, with lower oxygen permeability.

Silicone Hydrogel: latest generation lenses, with high oxygen permeability, and  moderate hydration.

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Time based:

  • daily
  • biweekly
  • monthly
  • 3 months (older generation)
  • yearly (conventional)

Wear based:

  •  daily wear
  • extended wear
  • continuous wear

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Corrective: to correct vision defects and improve the patient’s vision. Corrective contact lenses can be used to correct vision defects such as hyperopia, myopia (spherical lenses), astigmatism (toric lenses) or presbyopia (progressive lenses).

Spherical: unifocal lenses with the lens power indicated by PWR, intended for nearsightedness and farsightedness. People wearing “+” will need lenses with higher power, and people wearing “-” power lower than in eye glasses.

Toric: these are corrective lenses for myopia or hyperopia with additional parameters that compensate for image distortions caused by astigmatism. In addition to PWR, they have additional parameters such as cylindrical power (CYL) and cylinder axis (AX).

Progressive: bifocal, multifocal. They allow us to look far, near and at intermediate distances (e.g. at the computer monitor). In short – we can replace two pairs of unifocal lenses with one pair of progressive lenses

Cosmetic: designed for people who want to emphasise or completely change the colour of the iris of the eye, they are used to cover the defects of the external parts of the eye.

Therapeutic: they are used as dressings or drug carriers in various types of diseases or injuries of the cornea.

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Spherical power: the basic parameter of a contact lens, usually abbreviated to (PWR).

Toric Lens: it is used to correct astigmatism, and in addition to spherical power, cylindrical power (CYL) and cylinder axis (AX) are given.

Base curve: it is abbreviated (BC), and informs about the geometry of the inner surface of the lens, which is in direct contact with the eye. Too tight a lens can prevent the flow of tears between the cornea and the lens, which is important for proper eye hygiene.

Diameter: it is abbreviated (DIA), and describes the size of the lens, which should cover the cornea of the eye.

Hydration: the water content of the material from which the lenses are made. The greater the degree of hydration, the greater the oxygen permeability (Dk) through the lens.

Oxygen-permeability: it is abbreviated (Dk/t). Cornea does not contain blood vessels and uses atmospheric oxygen, therefore the greater the lens permeability, the healthier it is for our eyes. The recommended safe minimum is 125 Dk/t.

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  1. Always wash your hands thoroughly before contacting the lenses or the eye. Then rinse thoroughly and dry your hands with a lint-free cloth.
  2. Open the blister in which the lens is located, then remove the lens with the tip of the index finger. It’s important to always start with the same eye. Check whether the contact lens is not inside out. We place it on the tip of the index finger and check its shape, it should resemble the shape of the cup.
  3. With the finger of your other hand, pull back and hold the upper eyelid to stop the blink reflex.
  4. To place the lens on the eye, bring the lens closer to the cornea, look up and gently place the lens on the lower part of the eye.
  5. Blink a few times and allow the lens to settle. 

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  1. Before removing the lens, prepare a case into which you pour the right amount of solution.
  2. As for putting the lenses on, wash and dry your hands thoroughly.
  3. Look up and pull the lower eyelid down. Place your index finger close to your eye until you touch the lower edge of the lens.
  4. Gently grasp the lens with your thumb and forefinger, then take it out from your eye.
  5. Place the lenses in a case with solution, and make sure that their entire surface is immersed in the solution.
  6. In the case of daily disposable lenses, they must be removed and discarded.
  7. Never rinse the lenses or lens case with tap water.

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Hygiene is one of the most important factors in preventing infection and other problems that can affect eye health as well as eye vision in the long run.

With daily disposable lenses it is simple – just keep your hands clean to take them out safely and then just throw them away. Biweekly or monthly lenses require several steps to maintain their properties during use and they must be properly cared for. Protein-lipid deposits accumulate on the lenses, which can become a source of nutrients for bacteria.

  1. Lenses are recommended to be cleaned each time they are taken out from the eye.
  2. Proper lens care is also choosing the right solution for their care. Currently used solutions belong to one of two groups: multipurpose or oxidative solutions, they do not contain preservatives and function on the basis of a chemical reaction that breaks the hydrogen peroxide into water and hydrogen.
  3. After removing the lens from the eye, place it on the inside of the hand, with one finger gently rub the lens located in the hollow of the palm to clean its surface.
  4. Carefully rinse the lens in a few drops of the solution.
  5. Then place the lens in the clean lens case. Close the case and leave the lenses in it overnight.

Proper care of the lenses is also taking care of the cleanliness of the case in which you store them. It should be washed after each removal of the lenses (also with the lens solution) and allowed to dry.

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