Trusted eyewear advice from EZOnTheEyes to see well, look good, and buy smart
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Contact Lens Prescriptions
Woman looking in mirror and putting in contact

Hybrid Contact Lenses: A Solution for Difficult Prescriptions?

Written By Lauren Anderson

The majority of contact lenses sold today are either soft lenses or rigid gas permeable (RGP) lenses. But there is another type of contact lens.

Hybrid contact lenses combine the features of both types. They have a rigid gas-permeable inner section surrounded by a soft outer skirt.

They’re most often prescribed for people with keratoconus, severe astigmatism, and other corneal conditions that can be difficult to correct with standard contact lenses.

We’re going to discuss exactly what hybrid contact lenses are and how they can help with these conditions.

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June 19, 2026
Glasses, contacts, and an eye prescription

How Long Are Eye Prescriptions Good For?

Written By Lauren Anderson

If you wear glasses or contacts, you should have an expiration date printed on your prescription. You may be wondering, how long are eye prescriptions good for typically?

In the U.S., prescriptions for glasses usually expire after one or two years. Most contact lens prescriptions are valid for one year.

Eye doctors also have to consider things like age, eye conditions, and the general health of the patient before they decide on an expiration date.

Let’s get into how long eye prescriptions are good for in the U.S. and why some expire sooner than others.

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June 5, 2026
Snellen chart on a white wall

Understanding 20/200 Vision​: What It Means for Your Eyes

Written By Vivian Cummings

Have you or a loved one been told you have a visual acuity of 20/200? You may be wondering what exactly that means.

Visual acuity is the measure of the clarity or sharpness of your vision. To put it simply, someone with 20/200 vision needs to be at 20 feet to see what a person with ‘normal’ 20/20 vision can see at 200 feet. That’s a pretty significant decline in vision.

Let’s get into what 20/200 vision is and correction options.

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June 5, 2026
Close-up of eye test and glasses

What Is a Diopter? How Lens Strength Is Measured

Written By Lauren Anderson

If you wear glasses or contact lenses, you’ve seen diopter numbers before! They’re the pluses and minuses on prescriptions, such as -2.00 or +1.50.

Most people know that bigger numbers mean thicker or stronger glasses. But you may still be asking, what is a diopter exactly? And what’s it measuring?

Once you fully understand how this all works, your prescription will make a lot more sense. Let’s get into it!

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May 29, 2026
Close-up of an eye

What Is CYL in Eye Prescription​?

Written By Vivian Cummings

CYL, SPH, Axis… what are they?

If you’re staring at the numbers and letters on your lens prescription, you might be curious. Maybe you want to know whether your prescription has changed or if it was filled correctly. You could also have questions about what all those abbreviations are.

So, what is CYL in eye prescription? Let’s get more into what CYL and those other abbreviations mean!

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May 18, 2026
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