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Contact lenses are medical devices that can be worn to correct vision or for cosmetic or therapeutic reasons. In some provinces, all contact lenses, even purely cosmetic ones, require a prescription. Moreover, they must be properly fitted and prescribed by a licensed eye care professional. Entrust your ocular health only to qualified professionals. In Edmonton, visit eye-deology Vision Care for personalized contact lens fitting and troubleshooting.
Did you know that in some provinces only licensed professionals can legally prescribe and dispense contact lenses and prescription eyewear? Our licensed and experienced optometrists ensure that patients are prescribed the contact lenses best suited for their unique prescription, eye shape (i.e., comfort), and desired wear schedule. Patients are always welcome to visit us in Edmonton for custom contact lens fitting and/or medical assistance.
Annual eye exams are essential for contact lens wearers. They ensure that the patient has an accurate prescription, that the contact lenses properly fit, and that contact lens wear is not promoting unwanted ocular health issues. Eye care is paramount at eye-deology Vision Care and that is why online customers must supply a current contact lens prescription before their online contact lenses orders will be filled.
Benefit medically and financially when you purchase contact lenses from our licensed professionals. With our Clinical mail-in rebates on purchases of 6-month and 1-Year quantities of contact lenses, patients can save with the peace of mind that qualified eye care professionals are providing customer service. Receive the best care and the best savings on contact lenses at eye-deology Vision Care in Edmonton, Alberta.
The most common contact lens materials are hydrogel, silicone hydrogel and rigid gas permeable lenses. Hybrid contact lenses also exist, but they are less common. The hybrid design offers the comfort of soft or silicone hydrogel lenses combined with the crystal-clear optics of gas permeable lenses. They are characterized by a rigid gas permeable central zone surrounded by a ring of hydrogel or silicone hydrogel material.
Soft lenses are made from gel-like, water-containing plastics called hydrogels. These lenses are very thin and pliable and conform to the front surface of the eye. Introduced in the early 1970s, hydrogel lenses made contact lens wear much more popular because they typically are immediately comfortable. The only alternative at the time was traditional hard contact lenses made of PMMA plastic. Soft contact lenses generally offer greater initial comfort than rigid lenses, shorter adaptation periods for new wearers amd are ideal for occasional wear.
Silicone Hydrogel lenses are an advanced type of soft contact lenses that are more porous than regular hydrogel lenses and allow even more oxygen to reach the cornea. First introduced in 2002, these lenses increased oxygen permeability (increased comfort, longer wear and better eye health), wettability (better comfort) and clinical performance over other options. Because silicone has higher oxygen permeability than water, oxygen permeability is no longer dependent on the amount of water is in each lens. These are currently the most popular lenses prescribed in North America.
Commonly referred to as rigid gas permeable (RGP) contact lenses, these lenses are rigid (i.e. hard), but porous, allow oxygen to pass through them. Because they are permeable to oxygen, RGP lenses can be fit closer to the eye, making them more comfortable than traditional hard lenses. RGP contacts often provide sharper vision than soft and silicone hydrogel contacts, especially for patients with astigmatism. In general, wearers require a period to adjust to gas permeable lenses, but after adapting, most patients find the lenses are as comfortable as hydrogel lenses.
The four most common types of contact lenses are spherical, toric, multifocal and cosmetic. Scleral contact lenses, which are larger and cover more of the eye, are becoming more popular, especially for individuals with unique needs or conditions such as keratoconus. When ordering contact lenses, it is important to order the type and brand recommended by your optometrist or ophthalmologist following a diagnostic lens consultation.
Spherical contact lenses are designed to have the same lens power throughout the entire optical part of the lens to correct myopia (nearsightedness) or hyperopia (farsightedness). Because spherical contact lenses have the same power in all meridians, it doesn't matter if they rotate on your eye when you blink. Spherical contact lenses are the most common contact lens designed purchased. These contact lenses are the equivalent to a single vision eyeglass lens.
Toric soft contact lenses have different powers in different meridians of the lens to correct for astigmatism as well as nearsightedness or farsightedness. Toric lenses are designed to enable the lens to rotate to the proper orientation on the cornea so the power meridians of the lens align with the appropriate meridians of the eye for clear vision. Because toric lenses have different powers at different meridians, they must remain rotationally stable and move only vertically when the eye blinks. To achieve stability some toric lenses are weighted at their bottom.
Multifocal contact lenses (including bifocal contacts) contain different power zones for near and far vision to correct for presbyopia as well as nearsightedness or farsightedness. Some multifocal lenses also correct for astigmatism. Bifocal contacts lenses include two prescriptions in the lens, while multifocal contact lenses incorporate a range of powers in the lens. These contact lenses are the equivalent to bifocal and progressive eyeglass lenses.
Wearing contact lenses offers a number of benefits and conveniences. Maintaining those benefits and conveniences is largely dependent on proper contact lens care and wear. From maintaining proper hygiene to following the manufacturer's wear schedule to using the recommended cleaning solutions, proper contact lens care and wear minimizes the liklihood of infections, abrasions and/or vision impairment.
Contact lenses should always be worn according to the manufacturer's recommended wear schedule. Failing to do so can result in painful eye infections, corneal ulcers, corneal abrasions and can sometimes cause a reshaping of the cornea. Soft contact lenses are available in daily, bi-weekly and monthly wear schedules. Consider convenience, cleanliness and cost when choosing contact lenses.
All contact lenses - dailies, weeklies, monthly, hard and soft - require care. It is essential that contact lenses are properly handled, cleaned, and replaced according to the manufacturer specifications. Always wash your hands properly and dry them with a lint-free towel before handling contact lenses the recommended solution(s) for cleaning. Improperly caring for contact lenses can often result in eye infections, corneal abrasions, and require that only glasses be worn during recovery.
The shape of the cornea can change and these changes can cause the fit of contact lenses to be less than optimal. Poorly fitting lenses can result in infections, painful corneal abrasions and/or permanent scarring. It is essential that contact lens wearers receive an annual contact lens eye exam from a licensed professional. These exams are comprised of a suite of special tests and measurements performed to ensure the proper fit of the contact lenses and that wear is not impacting ocular health.