Posts Tagged ‘Contact Lenses’
Allergic conjunctivitis is divided into several subtypes depending on the nature of the allergen. Seasonal allergic conjunctivitis, vernal conjunctivitis, perennial allergic conjunctivitis, atopic keratoconjunctivitis, medication reactions, contact lens allergy, giant papillary conjunctivitis, contact eye allergies and toxic papillary reactions are some of the most common type of eye allergies.
Seasonal Allergic Conjunctivitis: Seasonal allergic conjunctivitis as the name suggests are eye allergies caused during the particular season of a year. In it the eyes become red, watery and itchy. Persons affected also have burning sensation and eyelid swelling. During the summer season, it is caused due the exposure to grass and different types of tree pollen. In the fall, it is caused mainly due to the exposure to weed pollen. Seasonal allergic conjunctivitis is sometimes referred as ‘hay fever eyes or hay fever conjunctivitis or allergic rhinoconjunctivitis.’ An estimated 25% of American population is affected by seasonal allergic conjunctivitis.
Topical antihistamine, topical decongestants and mast cell stabilizers are the ideal treatments. An ophthalmologist should be consulted, if there is a decrease in vision or excessive pain or thick discharge,
Vernal Conjunctivitis: Vernal conjunctivitis is a severe form of seasonal allergic conjunctivitis and is mainly seen in children and youngsters. In it the eye become itchy, red and watery and develops pain. The eyes become sticky due to a discharge and are quite hard to open. The pain intensifies when opening the eyes after sleeping. The inner membranes of the eyelids swell and conjunctiva has change in appearance. Vernal conjunctivitis should be treated immediately as it can lead to corneal damage.
Topical antihistamines, mast cell stabilizers, and low dose topical steroids are the most effective form of treatment. The occurrence of the allergy is more common during late spring, when dry and dusty conditions prevail. Using sunglasses can be very helpful.
Perennial Allergic Conjunctivitis: Perennial allergic conjunctivitis occurs throughout the year and can be caused by both indoor and outdoor allergens. The main causes are house dust mites, pet dander and several other indoor allergens. In it the eyes become mildly itchy, watery and red.
Atopic keratoconjunctivitis: Atopic keratoconjunctivitis is one of the most severe forms of eye allergies. People with eczema are more prone to it. Continuous itching and dry eyes are the common symptoms, which is followed by blurred vision. Atopic keratoconjunctivitis, also referred as eczema eyes, if not treated can lead to corneal swelling and conjunctival scarring. This form of eye allergy is quite rare and is seen mainly in older people.
Apart from airborne allergens, atopic keratoconjunctivitis can be caused by common food substances. Topical antihistamines, mast cell stabilizers and short term use of steroids are the ideal treatment. This type of allergy should be treated immediately as there have been rare cases which have led to blindness.
Medication Reactions: Eye allergies can be caused by the intake of certain medicines. Conjunctival swelling and itching are the common reactions. The reactions occur immediately and can vary from mild to severe. Anesthetics, bacitracin, topical penicillin, and sulfacetamide are some of the medicines which can trigger eye allergies.
Since they were first developed as hard glass lenses in the 1950s, contacts have gone through many transformations and technical improvements in quality, look and feel.
Today, with the modern advancements of disposable lenses and toric lenses, more and more people are changing from spectacles and enjoying the benefits of corrective eye lenses.
The latest, exciting development and daring innovation in the contact lens industry, however, is the fabulously varied colored contacts that are now widely available and gaining in popularity.
Gone are the days when contact lenses were worn as a sight correction device. They are far more than just functional corrective eye wear – they’re now funky, fun and an outrageously theatrical fashion statement!
Colored contacts let you suggestively enhance the color of your eyes on a permanent basis or just for an occasional night when you want to accessorize with a particular outfit.
Now – whatever the occasion you can make a truly unforgettable ‘eye catching’ appearance and show off your extraordinary ‘eye catching’ style!
There are four different types of colored contacts for you to choose from – visibility tints, enhancement tints, opaque-color tints and light-filtering tints.
But the best thing of all is most of these come in styles that can be worn by people who do not necessarily need corrective eye wear. These style contacts are known as plano form lenses.
Visibility tint colored contacts have a practical application. They have a light blue or green tint that, although not visible when being worn, allows you to see them when you are inserting or removing the lenses. And when (not if!) you drop them they are much easier to find!
In contrast, enhancement tint colored contacts have a translucent but darker tint to them. These lenses are not meant to alter or change the shade of your eyes but rather to enrich and enhance your existing eye color – hence, their name.
The Opaque color lenses with their dazzling array of colors have the most dramatic impact and can completely change your eye shade from brown to blue, blue to purple, etc. Wear them as a fashion statement or just for a change of mood if you want.
Light-filtering contacts also have a practical application. When wearing these they will greatly enchance certain colors in your field of view, making them easier for you to see.
Having trouble driving that tiny little golf ball down the fairway? Wearing a pair of these performance lenses will make that golf ball stand out and easier for you to hit. These performance tested lenses will be the next step forward in corrective eye wear.
The term cataracts refers to a clouding of the eye’s lens that is located behind the iris and pupil. This particular lens operates by focusing light on to the retina, much in the same way as a camera lens. The lens affected by cataracts is also involved in the eye’s focus.
This lens consists of protein and water. This protein is precisely arranged for optimum functioning. However, during the natural aging process, these proteins can become clumped together and cause the eye to cloud. This cloud is what is known as a cataract and will most likely get larger as time progresses if left untreated. Your eye doctor will probably want to wait until the cataract interferes with your eyesight before opting to remove it.
There are three different types of cataracts you should know about:
Cortical Cataracts: This type of cataract is formed in the cortex of the lens. Over time, a cortical cataract will extend from the outside of the lens to the center. This type of cataract is common to diabetes sufferers.
Nuclear Cataracts: Nuclear cataracts are the most common type of cataracts. Forming in the center of the lens, this type of cataract is caused by the normal aging process. When this cataract first forms, you may even experience improved vision. However, this effect will not last long.
Subcapsular Cataracts: This kind of cataract starts at the back of the lens. If you take steroids, have diabetes, or suffer from farsightedness, you may be susceptible to supcapsular cataracts.
Fortunately, all three types of cataracts can be removed with eye surgery. Today’s surgeons implement the use of lasers and other innovative technology to remove a patient’s cataracts with a minimum of risk or discomfort. Some cataract surgeries will involve removing the clouded lens and replacing it with a clear plastic lens called an intraocular lens.
While cataract removal surgery is relatively safe, you may experience a few side effects such as swelling, bleeding or discomfort. Your eye doctor will advise you on the steps to take during recovery to aid proper healing.
Nutritionists are currently studying the role diet plays in the prevention of cataracts. Research has shown a favorable link between antioxidants and the prevention of cataracts. Antioxidants are vitamins such as Vitamin A, Vitamin C and Vitamin E that work to fight harmful free radicals in the body.