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Eye dryness has many causes. One of them has to do with the composition of eye lubrication. Tears are comprised of water, mucous, oils [link widoczny dla zalogowanych], and antibodies. Each of these components has a specific job. If the ratio of components becomes unbalanced, dry eyes result. Another common cause for dry eyes is simply aging. This can be especially true for women going through menopause. Certain medications can also cause dry eyes, for example, oral contraceptives and antihistamines.
Tips for Combating Dry Eyes for Contact Lens Wearers
Sometimes opthamologists will suggest their patients try Rigid Gas Permeable (RGP) lenses in an effort to lessen the impact of dry eyes from contact lens wearing. There is a simple explanation for this recommendation.
In the absence of any special needs, contact lenses are fraught with complications. Someone who has no issues with their eyes' lubrication will find that contact lenses dry out their eyes over time. So if someone is coming to the table with dry eyes to begin with, wearing contact lenses will be a balancing act. In contact lens wearers who have no issues with eye lubrication, a layer of tears remains constant underneath the lens. These tears serve to keep the eye clean, sterile and wet. In a person who has dry eyes, wearing contact lenses is much more challenging. As their eye begins to dehydrate, the lens begins to irritate and chafe the eye. Wearers have reported the experience is much like having "sand in your eye." Ouch! That's uncomfortable. Indeed [link widoczny dla zalogowanych], inadequately lubricated eyes evoke many symptoms, and a gritty feeling is the most commonly reported.
Contact lens wearers utilize many tools in their attempt to resist and defy dry eyes. A contact lens wearer with their head titled back, eyes held open wide as they apply contact lens wetting drops is a common sight. They may even remove the lenses, soak them in solution for a time and reinsert them. Some people opt to purchase lenses which are replaced at intervals in an attempt to keep wetter lenses. There are also lenses constructed from materials meant to increase moisture retention. Contact lens wearers are also advised to practice appropriate eye care and to blink their eyelids at short intervals. This assists the eye is moisturizing itself and the lenses.
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Using RGP Lenses
The contact lens industry is continually laboring to develop products to counteract this phenomenon and to create lenses that will retain moisture more effectively. The manufacturers take dry eyes very seriously since the problem impacts many potential and current contact lens wearers. Reducing the water content of the lens itself is a means manufacturers are investigating. Water embodies roughly 30% of today's silicon hydrogel lenses. In previous incarnations of contact lenses [link widoczny dla zalogowanych], that percentage was much higher. Typically, water was between 50 to 60% of the lens.
If a person has dry eyes then he/she is likely have some intermittent discomfort, depending on how exaggerated the problem is. If one wears glasses and is considering contact lenses, then dry eyes take on a whole new significance.
Causes for Dry Eyes
And unfortunately, extended time periods of contact lens wear can provoke dry eyes in people who previously had no issue with eye lubrication. Contact lenses contain water, which is essential for providing moisture and maintaining moisture balance and comfort. Regardless of the regimen used by the wearer, as the unfolds the water in the lens itself dries up and dissipates. To compensate, the lenses soak up the moisture found in one's eye's tear film. The outcome? Dry eyes.