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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 Tempe Eyecare Associates in Tempe to book your contact lens eye exam today!

Diet + Exercise + Eye Exams = Good Vision

Diabetes Awareness Month – Learn about Diabetic Eye Health in Tempe

November is Diabetes Awareness Month, a time to learn more about diabetes of all types – type 1, type 2, and gestational diabetes.

Everyone knows the word “diabetes,” but can you define the condition? Diabetes is a disease characterized by higher than normal glucose levels in your blood. Blood glucose is what fuels your body, and it comes from the food you eat. When blood sugar flows through your bloodstream, insulin is needed to help it enter your body cells so it can be used for energy. However, if you have diabetes, your body may make insufficient insulin or not be able to use the insulin properly. As a result, all that sugar stays circulation in your blood – unable to be converted into energy.

Diabetes can be managed very well through diet, exercise, and taking medication. Without controlling diabetes by keeping blood sugar levels within the parameters recommended by your doctor, the high blood sugar can damage many organs – including your eyes. Staying healthy by following your personalized diabetes management plan and making sure to visit your eye doctor for regular eye exams, you can pave your path to good vision and eye health!

Diabetic eye health & diabetic eye disease

To state the facts – diabetes-related eye disease can lead to vision loss, but if you have diabetes, you can minimize your risk of developing diabetic eye disease. Taking charge of your health and visiting our Tempe eye doctor for regular eye exams can help prevent these diseases from developing.

Diabetic eye disease comprises several ocular conditions:

  • Diabetic retinopathy – occurs when the small blood vessels in your retina bleed and leak
  • Macular edema – swelling that occurs along with retinopathy; it happens when the retinal blood vessels in the macula (central region of the retina) leak and lead to inflammation
  • Cataracts – a clouding of the lens in the eye, which can cause blurry vision
  • Glaucoma – increased intraocular pressure, which damages the optic nerve and can cause loss of peripheral vision

Diabetes eye exams

With regular check-ups by our Tempe eye doctor, you can help prevent eye problems or keep the problems minor. One mistake that many people with diabetes make is to assume that a diabetes eye exam is only necessary if they notice any symptoms. This couldn’t be further from the truth! A comprehensive eye exam is the only reliable way to detect several eye conditions that can cause vision loss, such as diabetic retinopathy, glaucoma, and cataracts. Early detection of these problems can make the difference between effective, successful treatment and damage to your vision. During your dilated eye exam, the eye doctor will use high-powered magnification to inspect the inner tissues of your eye thoroughly, checking the retina for signs of diabetic retinopathy and checking the optic nerve for any damage.

According to the American Diabetes Association (ADA) guidelines:

  • People with type 1 diabetes should have their first diabetic eye exam within the first five years
  • People with type 2 diabetes should visit their eye doctor for the first diabetic eye exam immediately after diagnosis. Type 2 diabetes can remain undetected for years, and vision damage can occur during this time.
  • Women with gestational diabetes should have an eye exam during the first trimester of pregnancy

After the first diabetic eye exam at Tempe, our eye doctor advises all adults with diabetes to visit yearly for a comprehensive dilated eye exam.

At Tempe Eyecare Associates, we put your family’s needs first. Talk to us about how we can help you maintain healthy vision. Call us today: 602-626-3907 or book an appointment online to see one of our Tempe eye doctors.

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Fall is Here! Do You Wish You Could See the Leaves Changing Color?

We offer specialized glasses for color blindness in Tempe

As autumn pushes the year forwards, everyone oohs and ahs over the fiery tones of the changing fall leaves set against a vivid backdrop of summer greenery. But if you have color blindness, whether you visit or live in a location with fall foliage, you probably suffer from a feeling of missing out. At Tempe Eyecare Associates, we understand – and we can help brighten your view of the world.

Despite the name, color blindness has nothing to do with going blind. It is a vision condition, more appropriately called color vision deficiency, in which the ability to discern colors is compromised. While colorblind individuals usually don’t see a stark black and white picture of the surrounding scenery, they do see colors differently from most people.

How do I know if I have color blindness, and who gets it?

Color blindness is not rare, affecting millions of people around the world. According to current statistics, about one in every 12 men in the United States is colorblind and one in every 200 women. (And yes, that is a possible reason why so many men ask for help when matching their tie to their shirt!)

Typically, color blindness is inherited – so blame genetics if you can’t make out all the hues of the rainbow. Also, it can be present from birth, show up during childhood, or make a sudden appearance in adulthood. Other than genetics, color blindness can also be due to chemical or physical damage to parts of the brain that process color cues, to the eye itself, or to the optic nerve. As cataracts develop, they can also dim and dull your color vision.

If you notice that colors don’t look distinct to you, a specialized eye exam using diagnostics to test color vision in our Tempe eye care center can diagnose this disorder. Contact us to book an appointment with our eye doctor.

What causes color blindness?

You need to understand the basics of color vision in order to understand the loss of this ability. Our Tempe optometrist explains that your eyes and brain partner to see all the properties of light. When you see reflected light, you see color – and the particular color depends on how long the reflected wavelengths of light are. For example, a red rose is only red because it reflects the long wavelengths of red light, absorbing all others at the same time.

In order to see all of the light around you, your cornea and lens focus the wavelengths onto the retina at the back of your eye. There awaits millions of photoreceptors – called rods and cones – which are cells that are sensitive to light. The rods and cones contain photopigment molecules that absorb light, and this process triggers electrical signals to be conveyed from the retina to the brain.

Rods respond more powerfully to dim light, and cones react more forcefully to bright light. Also, cones contain one of three different photopigments, making them sensitive to red, green, and blue light wavelengths. That means in order to see all the hues that are out there, you need all your cones to function fully and properly. When there is a defect in the genes that produce your photopigments, congenital color blindness results.

Is there only one kind of color blindness?

No, there are three main types:

  1. Deuteranopia, most common, is a form of red-green color blindness
  2. Protanopia is another form of red-green color blindness that affects the ability to discern between blue and green and between red and green
  3. Tritanopia, also called blue-yellow color blindness, causes people to get confused between blue and green or violet and yellow

What’s the treatment for color blindness?

While there’s no magic bullet to cure all color blindness, specialized lenses and advanced optics are now available to enhance your ability to precisely differentiate between colors. Called “color blind glasses”, this eyewear is crafted with amazing technologies. Basically, the lenses have built-in, customized tints that filter out certain wavelengths of light – giving you a more accurate perception of the spectrum of color tones.

We are always excited to see the reaction of patients who put on color blind glasses for the first time in our Tempe eye care clinic. Suddenly, traffic lights make sense and flowers bloom in more than one shade!

Ready to see not only the trees, but the vibrant red and green of the leaves too? Book a color blindness eye exam and consultation with our experienced eye doctor at Tempe Eyecare Associates.