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Contact Lens Solution

The Importance of Eye Exams for Contact Lenses

Are you planning on wearing contact lenses for the first time? Do you need a new contact lens prescription? Are your current contacts not as comfortable as you wish they were? Your eye doctor will perform a contact lens eye exam to ensure that your vision with contacts is clear, comfortable, and safe, providing you with the right lenses for you.

What is a contact lens exam?

If you wear or want to wear contact lenses, you’ll need an eye exam for contact lenses, in addition to your regular comprehensive eye exam. Special tests are performed during a contact lens exam to evaluate your eyes and vision with contacts.

Are eyeglass prescriptions the same as contact lens prescriptions?

No, a prescription for glasses cannot be used for contact lenses. An eyeglass prescription is for lenses that are positioned approximately 12 millimeters from your eyes, whereas a contact lens prescription is measured for lenses that sit directly on the surface of your eye.

The prescription for contact lenses also includes the brand, lens diameter and curvature, which are not part of an eyeglass prescription.

Contact lenses fitting: One size does not fit all

One contact lens size doesn’t fit all eyes. If a contact lens is too flat or too steep for your corneal shape, you may experience discomfort or even eye damage. Your eye doctor will take certain measurements to determine the best contact lens design and fit for your eyes.

Corneal curvature

This measures the curvature of your eye’s clear front surface (cornea) so the eye doctor can select the optimal curve and diameter for your contact lenses. If your eye’s surface is somewhat irregular because of astigmatism or other conditions, you may require a special lens.

Pupil and iris size

The size of your pupil and iris (the colored part of your eye) is also important in determining the best contact lens design.

Tear film evaluation

This test evaluates the quality of your tears, to determine whether they will be able to keep contact lenses and your cornea sufficiently hydrated throughout the day. If you have dry eye disease, standard contact lenses may not be right for you.

Trial lenses

Following the eye exam, you will be provided with trial lenses to verify that the chosen contact lenses offer clear and comfortable vision. This will allow the eye doctor to make any fine adjustments to the prescription.

Contact Lens Eye Exam Near You

Wearing the correct contact lenses for your eyes allows you to enjoy all of the benefits of wearing contacts, while keeping your eyes healthy and comfortable.

If you’re already a contact lens wearer, visit your eye doctor at least once a year to make sure the lenses are still providing you with optimum vision and comfort.

Contact Aspen Eye Care in Sherwood Park to book your contact lens eye exam today!

Here’s Why Hydrogen Peroxide is an Excellent Contact Lens Solution

Once you and your doctor have decided on the type of contact lenses you’ll need, it’s time to choose the most suitable contact lens solution for your eyes and contacts. 

There exist 2 different types of solution for contact lenses: Multipurpose and Hydrogen Peroxide-based. While both remove debris and build-up, and disinfect lenses, only hydrogen peroxide is capable of penetrating the microbial biofilms for a deeper clean. As an added benefit, hydrogen peroxide does not contain preservatives — which can be particularly beneficial for those with allergies or eye sensitivities. 

Multipurpose Solution

Multipurpose solutions are straightforward and easy to use; only one solution is needed to rinse, clean, disinfect and store your contacts (as seen in the image). Their convenience and low cost make them a popular choice. 

Hydrogen Peroxide Solution

Hydrogen peroxide solutions, such as Clear Care® by Alcon or Refine One Step™ by CooperVision, contain no preservatives or allergens. This solution thoroughly breaks up the proteins and removes deposits on the lenses during the disinfection process, which can be beneficial for people who tend to accumulate large amounts of build-up on their lenses. Moreover, hydrogen peroxide is more effective at battling acanthamoeba keratitis (an eye infection that may lead to blindness) than all other types of contact lens solutions.

Since hydrogen peroxide is a chemical that causes stinging and burning when it touches the eye, after the contacts have been disinfected the solution must be neutralized to be healthy for your eyes. Included with every solution bottle is an upright contact lens case containing a platinum-coated disk that chemically reacts with hydrogen peroxide to decompose it into a safe, non-irritating, sterile saline solution. This chemical reaction produces bubbles inside the case as it undergoes the transformative process over a period of several hours. Since the neutralizing disk loses its effectiveness over time, it is critical to regularly replace it. 

If your eyes do make contact with hydrogen peroxide, make sure to immediately flush it out with sterile saline. If saline is not available, wash your eyes with water or artificial tear drops and make sure to see Dr. Aleem Bandali as soon as possible. Though painful, it doesn’t cause permanent eye or vision damage.

How does it work? 

To clean your lenses, place them in the designated case that is freshly filled with the hydrogen peroxide solution and soak them for 6-8 hours. This can be a one-step or two-step process, depending on the product. The one-step products contain a built-in neutralizer in the contact lens case, while the two-step products require you to add a neutralizing tablet to the solution after cleaning.

Make sure not to reuse or top off hydrogen peroxide solution after it has been neutralized, as it will have lost its disinfecting power. 

Be sure to dry your case thoroughly between uses and to replace your case every 2-3 months to prevent infection.

It is important to note that hydrogen peroxide solutions will change into unpreserved saline. Therefore, if contact lenses are stored for extensive periods of time (e.g. more than a couple days), it is safer to consider multiple-purpose solutions for long term. 

Hydrogen peroxide-based solutions are known for their exceptional disinfecting ability. At Aspen Eye Care, in Sherwood Park, our patients are extremely satisfied with the cleanliness and comfort they experience when using hydrogen peroxide-based solutions for their contact lenses. Speak with Dr. Aleem Bandali to find out whether this solution is right for you.