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All About Vision

Orthokeratology (CRT & VST)

Pretty, young Ortho K Lenses brunette
Orthokeratology, commonly called ortho-k, is a method used to correct myopia (nearsightedness) or astigmatism by wearing rigid gas permeable contact lenses overnight, so that no corrective lenses are needed during daytime hours.

Gas permeable (GP) lenses specialized for ortho-k are inserted at bedtime and worn as you sleep. Throughout the night, the lenses reshape your cornea gently so that your vision becomes clear on the following morning. The correction is temporary, and ideally no eyeglasses or contact lenses will be needed on the next day or two. In order to maintain sharp visual acuity on a daily basis, you need to wear the ortho-k reshaping lenses every night.

At present, three brands of orthokeratology contact lenses are approved for use by the FDA. Euclid Emerald, usually prescribed for myopia control, Paragon Vision Sciences, who produces “Corneal Refractive Therapy” (CRT), and Bausch and Lomb, who manufactures “Vision Shaping Treatment” (VST).

Candidates for Ortho-K

Ortho-k is very suitable for nearsighted people who are not appropriate candidates for vision correction surgery, such as children. Individuals of all ages with healthy eyes can try ortho-k, namely because it can be discontinued at any point without permanent effects to the eyes.

People who require vision correction and engage regularly in sports or work in extremely dusty, dirty environments will also appreciate the convenience of ortho-k.

Vision Results from Orthokeratology

Success rates for ortho-k are generally higher for more mild vision prescriptions. The ideal goal is to provide 20/20 vision without any need for eyeglasses or contacts during the day.

According to FDA trials conducted on both CRT and VST lenses, more than 65% of ortho-k patients achieved 20/20 visual acuity. A whopping number of more than 90% of ortho-k patients achieved 20/40 vision or better (this is the legal requirement for driving without vision correction in most states). Consult with your eye doctor to find out if your vision prescription is within range for successful ortho-k treatment.

Note that although improvement in vision is generally reported within a day or two of wearing ortho-k overnight, the full effects may not be experienced until the lenses are worn for a few weeks. During this transition period, your vision will probably not be as crisp as it was with regular contacts or eyeglasses, and glare or halos around lights may be visible. Until ortho-k works fully, a temporary pair of eyeglasses may be required for specific actions, such as driving at night.

How Does Ortho-k Feel?

Although some people have trouble wearing regular gas permeable contact lenses during the day, ortho-k GP lenses are worn while sleeping – so discomfort and awareness of the lenses in your eyes is generally not an issue.

Is Ortho-k expensive?

Professional fitting for ortho-k requires a series of visits to your eye doctor. A number of pairs of contact lenses are also generally needed. GP lenses that are special for ortho-k are more costly than standard contacts. In sum, the fees for ortho-k add up to a higher total than regular contact lenses.

LASIK after Ortho-k

Some consider Ortho-K to be a non-surgical alternative to LASIK. Nonetheless, refractive surgeries, such as LASIK, are possible after treatment with ortho-k lenses. Yet because ortho-k works to reshape your cornea, you are required to stop wearing the lenses for approximately several months before undergoing LASIK. This allows your eyes to return to their original shape.

It’s important to inform your LASIK surgeon if you’ve been wearing ortho-k lenses, and you will be advised as to how long of a wait is necessary before having the laser procedure.

Nearsighted (Myopia)

Nearsightedness, technically known as myopia, is a condition which causes difficulty focusing on objects at a distance, while near vision remains normal. Myopia is one of the most common vision problems worldwide and it is on the rise.

Myopia Signs and Symptoms

People with myopia are usually able to see well up close, but have difficulty seeing objects at a distance. Due to the fact that they may be straining or squinting to see into the distance, they may develop headaches, eye fatigue or eye strain.

Myopia Causes

Myopia is a refractive error caused by an irregular shaped cornea that affects the way light is focused on the retina. For clear vision, light should come to a focus point directly onto the retina. In myopia, the cornea is longer than usual, resulting in a focus point that falls in front of the retina, causing distant objects to appear blurry, while close objects can be seen normally.

Myopia typically has a genetic component as it often appears in multiple members of a family and it usually begins to show signs during childhood, often getting progressively worse until stabilizing around age 20. There may also be environmental factors that contribute to myopia such as work that requires focusing on close objects for an extended period of time and spending too much time indoors.

Diagnosis of Myopia

Myopia is diagnosed by an eye examination with an qualified optometrist. During the exam the optometrist will determine the visual acuity of the eye to prescribe eye glasses or contact lenses. A prescription for myopia will be a negative number such as -1.75.

Treatment for Myopia

Myopia is typically treated with corrective eyeglasses or contact lenses and in certain cases refractive surgery such as LASIK or PRK is an option. Surgery is the most risky treatment as it requires permanently changing the shape of the cornea. Other treatments involve implanting a lens that reshapes the cornea called a phakic intra-ocular lens or vision therapy. A treatment called Ortho-k, in which the patient wears corneal reshaping contact lenses at night to see without correction during the day can be another option.

While some people require vision correction throughout the day, others may only need it only during certain tasks such as driving, watching television or viewing a whiteboard in school. The type of treatment depends on the overall health of your eye and your eye and vision needs.

Orthokeratology (CRT & VST)

Pretty, young Ortho K Lenses brunette
Orthokeratology, commonly called ortho-k, is a method used to correct myopia (nearsightedness) or astigmatism by wearing rigid gas permeable contact lenses overnight, so that no corrective lenses are needed during daytime hours.

Gas permeable (GP) lenses specialized for ortho-k are inserted at bedtime and worn as you sleep. Throughout the night, the lenses reshape your cornea gently so that your vision becomes clear on the following morning. The correction is temporary, and ideally no eyeglasses or contact lenses will be needed on the next day or two. In order to maintain sharp visual acuity on a daily basis, you need to wear the ortho-k reshaping lenses every night.

At present, three brands of orthokeratology contact lenses are approved for use by the FDA. Euclid Emerald, usually prescribed for myopia control, Paragon Vision Sciences, who produces “Corneal Refractive Therapy” (CRT), and Bausch and Lomb, who manufactures “Vision Shaping Treatment” (VST).

Candidates for Ortho-K

Ortho-k is very suitable for nearsighted people who are not appropriate candidates for vision correction surgery, such as children. Individuals of all ages with healthy eyes can try ortho-k, namely because it can be discontinued at any point without permanent effects to the eyes.

People who require vision correction and engage regularly in sports or work in extremely dusty, dirty environments will also appreciate the convenience of ortho-k.

Vision Results from Orthokeratology

Success rates for ortho-k are generally higher for more mild vision prescriptions. The ideal goal is to provide 20/20 vision without any need for eyeglasses or contacts during the day.

According to FDA trials conducted on both CRT and VST lenses, more than 65% of ortho-k patients achieved 20/20 visual acuity. A whopping number of more than 90% of ortho-k patients achieved 20/40 vision or better (this is the legal requirement for driving without vision correction in most states). Consult with your eye doctor to find out if your vision prescription is within range for successful ortho-k treatment.

Note that although improvement in vision is generally reported within a day or two of wearing ortho-k overnight, the full effects may not be experienced until the lenses are worn for a few weeks. During this transition period, your vision will probably not be as crisp as it was with regular contacts or eyeglasses, and glare or halos around lights may be visible. Until ortho-k works fully, a temporary pair of eyeglasses may be required for specific actions, such as driving at night.

How Does Ortho-k Feel?

Although some people have trouble wearing regular gas permeable contact lenses during the day, ortho-k GP lenses are worn while sleeping – so discomfort and awareness of the lenses in your eyes is generally not an issue.

Is Ortho-k expensive?

Professional fitting for ortho-k requires a series of visits to your eye doctor. A number of pairs of contact lenses are also generally needed. GP lenses that are special for ortho-k are more costly than standard contacts. In sum, the fees for ortho-k add up to a higher total than regular contact lenses.

LASIK after Ortho-k

Some consider Ortho-K to be a non-surgical alternative to LASIK. Nonetheless, refractive surgeries, such as LASIK, are possible after treatment with ortho-k lenses. Yet because ortho-k works to reshape your cornea, you are required to stop wearing the lenses for approximately several months before undergoing LASIK. This allows your eyes to return to their original shape.

It’s important to inform your LASIK surgeon if you’ve been wearing ortho-k lenses, and you will be advised as to how long of a wait is necessary before having the laser procedure.

Nearsighted (Myopia)

Nearsightedness, technically known as myopia, is a condition which causes difficulty focusing on objects at a distance, while near vision remains normal. Myopia is one of the most common vision problems worldwide and it is on the rise.

Myopia Signs and Symptoms

People with myopia are usually able to see well up close, but have difficulty seeing objects at a distance. Due to the fact that they may be straining or squinting to see into the distance, they may develop headaches, eye fatigue or eye strain.

Myopia Causes

Myopia is a refractive error caused by an irregular shaped cornea that affects the way light is focused on the retina. For clear vision, light should come to a focus point directly onto the retina. In myopia, the cornea is longer than usual, resulting in a focus point that falls in front of the retina, causing distant objects to appear blurry, while close objects can be seen normally.

Myopia typically has a genetic component as it often appears in multiple members of a family and it usually begins to show signs during childhood, often getting progressively worse until stabilizing around age 20. There may also be environmental factors that contribute to myopia such as work that requires focusing on close objects for an extended period of time and spending too much time indoors.

Diagnosis of Myopia

Myopia is diagnosed by an eye examination with an qualified optometrist. During the exam the optometrist will determine the visual acuity of the eye to prescribe eye glasses or contact lenses. A prescription for myopia will be a negative number such as -1.75.

Treatment for Myopia

Myopia is typically treated with corrective eyeglasses or contact lenses and in certain cases refractive surgery such as LASIK or PRK is an option. Surgery is the most risky treatment as it requires permanently changing the shape of the cornea. Other treatments involve implanting a lens that reshapes the cornea called a phakic intra-ocular lens or vision therapy. A treatment called Ortho-k, in which the patient wears corneal reshaping contact lenses at night to see without correction during the day can be another option.

While some people require vision correction throughout the day, others may only need it only during certain tasks such as driving, watching television or viewing a whiteboard in school. The type of treatment depends on the overall health of your eye and your eye and vision needs.

Sports and Specialty Eyewear Fitting

If you are serious about your sport or require specialty eyewear for your job or hobby, it’s worth scheduling a specialty eyewear fitting with your eye doctor. In addition to safety and eye protection, top athletic and occupational performance requires optimal visual acuity as well as a number of other visual functions such as peripheral vision, depth perception and hand-eye coordination. Sometimes color vision, eye tracking, night vision and light adaptation are also critical to performance. Your eye doctor at Calgary Trail Vision Centre will be able to do a full assessment of your vision while understanding your personal vision needs in order to recommend the best possible eyewear solution for you.

A standard comprehensive eye exam will not usually test for some of the additional visual and perceptual skills you need for serious sports or work environments. Your eye doctor will need to know the details about the skills required and conditions you face, in order to assess the best performance eyewear for your needs.

While off-the-rack sports or performance eyewear could be sufficient for your needs, if you have particular vision requirements or engage in certain types of activities, you might be a lot better off with a personalized fitting. Every aspect of the glasses from the fit, to the lens tint, to the size and the style can play a role in enhancing your safety, vision and performance, when it’s the right fit. This is why it makes more sense to fit the glasses to the individual rather than the individual to the glasses.

A sports performance exam may also identify some areas of your vision that could use improvement. When it comes to performance, especially for professionals, it is important to know where your visual skills and abilities stand and to be able to make improvements when possible. Many eye doctors in Edmonton, AB offer vision skills enhancement training for particular vision skills such as hand eye coordination or visual processing speed using computer simulations and other techniques. This type of training can enhance your performance whether it is in hitting a fastball, shooting a puck or aiming for a bullseye.

When it comes to sports and performance, you vision should be a given. With a specialty eyewear fitting you can find the eyewear that offers the most, comfort, safety, protection and vision enhancement for your particular needs.

Eye Allergies

Calgary Trail Vision Centre | woman with eye allergies in Edmonton, Alberta

Treatment for Ocular Allergies in Edmonton, Alberta

Your Eye Symptoms Could be Eye Allergies

Eye allergies alludes to when something you are adversely affected by, for example, dust, pet dander, mold spores or dust mites, aggravates the membrane of your eyes. Named unfavorably susceptible conjunctivitis, your eyes might be red, watery, bothersome or swollen. In the event that you experience the ill effects of any of these manifestations, or experience any eye disturbance, we provide a complete eye exam in our Edmonton center to decide whether hypersensitivities are the offender. Dr. Butts, our inviting and experienced eye specialist, is educated about diagnosing and treating eye allergies.

As a rule, sensitivities are caused when the immune system recognizes a specific substance as an allergen. Your immune system at that point goes overboard and produces antibodies that travel to your cells and discharge chemicals. The final product is an allergic reaction. You're presumably acquainted with hay fever and how individuals gripe about it! This is a type of allergic reaction, related to pollen and ragweed that floats in our environment. Allergies can strike inside as well, and activities, for example, tidying your home may stir up the dust mites and incite an allergic reaction. Tobacco smoke, perfumes and beauty care products are other known causes.

Symptoms that May Point to Eye Allergy

While eye allergies don't debilitate your vision, they can unquestionably be an irritation. Problems that by and large influence both eyes and show up not long after introduction to the hostile allergen. The typical side effects include:

  • Irritation
  • Redness
  • Watery eyes
  • Coarseness Swollen
  • Puffy eyelids
  • Sensitivity to light

In any case, these side effects could likewise indicate an eye infection or an alternate visual condition. That is the reason an exhaustive eye exam and appropriate diagnosis is so essential! It would be ideal if you contact our Edmonton optometrist for an appointment.

Eye Doctor Treats Eye Allergies

Avoidance of the annoying allergens is the best solution for eye allergies!

On the off chance that you are irritated by indoor allergies, it's beneficial to put resources into a vacuum with a HEPA filter. Discouraging your fuzzy four-legged companions from laying on your bed or other upholstery is likewise a smart thought.

Shy of staying inside with every one of the windows closed, maintaining a strategic distance from open-air allergens might be trickier. A few recommendations include:

Wear shades to block dust from direct contact with your eyes Antihistamine medication and other over-the-counter eye drops may help in the here and now by stifling the unfavorably susceptible response. However using some eye drops may reduce your side effects.

Counsel with Dr. Butts to discover which brands are ideal! Put on a cap with a wide brim to keep allergens from blowing at you Wash your hands well subsequent to petting any fuzzy animals Utilize saline drops after being outside; this washes allergens out from your eye tissue

Contact Lenses Can Complicate Eye Allergies

Many individuals have no issue or uneasiness from wearing contacts until allergy season comes around. Airborne allergens may attach themselves to your lenses, which causes aggravation. Some of our patients find that they have to diminish the time they wear contacts amid allergy season. A different option for managing eye allergies while wearing contact lenses is to wear daily disposables, which are disposed of before there's time for allergens to develop on the lenses.

Notwithstanding legitimate cleaning and sanitizing of your contact lenses, we may prescribe uncommon eye drops to wash your contacts for the duration of the day. As not all eye drops can be utilized with all materials of contact lenses, please check with Dr. Butts before placing anything in your eyes.

Various doctor prescribed pharmaceuticals may likewise be appropriate for reducing your eye allergies and the irritating side effects. We'll assess your condition in our Edmonton eye center and our expert optometrist, Dr. Butts, will prescribe the best treatment for your eye allergies!

Eye Care Services At Calgary Trail Vision Centre