How to Tell Which Side of the Contact Is Correct

July 5, 2025

Knowing whether your contact lens is correctly oriented or if you have a contact inside out is crucial for comfortable vision and preventing irritation. The simplest way to tell is by placing the lens on your fingertip: if it forms a perfect, smooth bowl shape with edges pointing straight up, it's correct. If the edges flare outwards, resembling a saucer or a shallow "V," it's likely inside out. For more on this, see our guide to Can People Tell If You're Wearing Colored Contacts.

The "Perfect Bowl" Test: Your First Line of Defense

Imagine a perfect half-sphere or a delicate, smooth bowl. This is the ideal shape for a correctly oriented contact lens. When you remove a fresh lens from its packaging or pick it up from your lens case, place it on the tip of your clean, dry index finger. Hold it up to eye level, against a good light source, and observe its profile.

A correctly oriented lens will have smooth, continuous edges that curve gently upwards, forming a perfect "U" shape. The rim will appear even and consistent all the way around.

The "U" vs. "V" Shape

This is perhaps the most reliable visual cue. If your contact lens is inside out, its edges will typically invert and flare outwards, creating a distinct "V" shape rather than a smooth "U." Think of it like a plate with a rim that's turned slightly outwards, rather than a cup. The edges might look slightly thicker, more jagged, or simply not as uniform as they should be.

It can be a subtle difference, especially with thin lenses, but training your eye to spot this "U" vs. "V" distinction will save you from discomfort. Always ensure your hands are thoroughly washed with soap and water and dried with a lint-free towel before handling your lenses to maintain proper hygiene.

The "Edge Test": A Closer Look at the Rim

Beyond the overall shape, paying close attention to the very edge of the contact lens can provide another clear indicator. This test focuses on the fine details that might be harder to discern from the broader "bowl" shape alone.

Smooth and Upright vs. Flared and Jagged

When a contact lens is correctly oriented, its rim should appear smooth, crisp, and slightly turned inward, pointing towards the center of the lens. It should look like a natural extension of the lens's curve, designed to sit flush against the curvature of your eye.

If the lens is a contact inside out, the edge will often look less refined. It might appear slightly flared, as if the very rim is trying to peel away from the main body of the lens. Sometimes, it can even look a little jagged or uneven, creating a less smooth transition. This subtle flaring is what causes the discomfort and sensation of something being in your eye, as the incorrect edge rubs against your cornea and conjunctiva.

Take your time to examine the edge carefully. Rotate the lens on your fingertip to view the entire circumference under good lighting. This meticulous check can prevent a lot of frustration once the lens is in your eye. If you're weighing options, our roundup of How to Tell If Colored Contacts Fit Properly is a good next read.

The "Taco Test": A Gentle Fold for Clarity

When visual inspection isn't enough, the "Taco Test" offers a tactile method to determine the correct orientation. This method involves gently folding the lens to observe its natural curvature. Remember, always perform this test with clean hands and use fresh contact lens solution.

Here's how to do it:

Place the contact lens on the tip of your clean index finger, just as you would for insertion.
Using your thumb and forefinger from your other hand, gently pinch the very base of the lens (where it sits on your index finger) towards the center.
Observe how the lens folds.

If the lens is correctly oriented, it will fold inward like a perfect taco shell, with the edges meeting cleanly without resistance. The curve will feel natural and uniform.

If the lens is a contact inside out, it will resist forming a smooth taco. The edges might try to fold outwards, or the lens might buckle unevenly, creating an awkward, less defined curve. It won't feel as natural or compliant when you try to gently pinch it.

This test is particularly useful for colored contact lenses, such as those from MyEyeColors, where the tint or pattern might sometimes make the subtle "U" vs. "V" shape harder to distinguish. The physical folding reveals the true curvature. If you're ever in doubt, the "Taco Test" is a reliable backup.

What Happens If You Wear a Contact Inside Out?

Wearing a contact lens inside out is generally not harmful in the long term, but it can cause immediate and significant discomfort. Your eyes are incredibly sensitive, and the subtle difference in the lens's curvature can lead to a range of unpleasant symptoms. The inverted edge, instead of sitting smoothly on the eye, will rub against the delicate surface, causing irritation.

Common symptoms include:

Discomfort: The most common complaint. It can feel like something is persistently in your eye, even after blinking.
Irritation and Redness: The constant rubbing can irritate the conjunctiva (the clear membrane covering the white part of your eye) and cornea, leading to redness and a gritty sensation.
Blurry or Fluctuating Vision: While the lens might still provide some vision correction, the incorrect fit can cause vision to be intermittently blurry or unstable, as the lens doesn't sit properly on the eye's surface.
Excessive Tearing: Your eye's natural response to irritation is to produce more tears, which can make your vision even blurrier.
Dryness: Paradoxically, despite tearing, the improper fit can also lead to increased dryness, as the lens may not hydrate the eye surface effectively.

If you experience any of these symptoms shortly after inserting your lenses, it's highly probable that one or both are inside out. Remove the lens, check its orientation using the methods above, and reinsert it correctly. Even the high-quality, comfortable lenses from MyEyeColors are designed to be worn in a specific orientation for optimal comfort and vision. Browse our range of colored contacts and accessories at browse our colored contacts, knowing that proper insertion is key to enjoying their full potential.

Tips for Preventing a Contact Inside Out Situation

Developing a consistent routine and being mindful during insertion can significantly reduce the chances of putting a contact lens inside out. Here are some practical tips: You might also like our take on How to Tell When Your Colored Contacts Expire.

Always Check Before Insertion: Make it a non-negotiable step to perform either the "Perfect Bowl" or "Edge Test" every single time before placing the lens on your eye. This quick check takes only a few seconds but saves a lot of discomfort.
Develop a Routine: Always start with the same eye (e.g., always the right eye first, then the left). This helps you stay organized and reduces the likelihood of mixing up lenses or forgetting which one you've checked.
Use Good Lighting: Proper illumination is essential for clearly seeing the subtle differences in lens curvature and edge profile. Insert your lenses in a well-lit area.
Be Gentle: When handling lenses, especially during the "Taco Test" or if you need to flip one, be as gentle as possible. Excessive squeezing or rough handling can damage the lens.
If Unsure, Re-Flip: If you've checked the lens and still aren't 100% confident it's the right way, it's always safer to assume it's inside out. Place it in your clean palm, add a drop of fresh solution, and gently manipulate it to flip it over before re-checking.
Consider Lens Tint: Some contact lenses, including many colored contacts, have a slight tint or an "OK" indicator mark to help with orientation. While MyEyeColors lenses are designed for comfort and aesthetic appeal, always rely on the shape tests first.

Remember, proper hygiene is paramount when handling any contact lens. Always wash your hands thoroughly with soap and water and dry them with a lint-free towel before touching your lenses or eyes. Use only fresh, sterile contact lens solution for rinsing and storage, never tap water or saliva.

When to Consult an Eye Care Professional

While wearing a contact lens inside out is usually a minor issue that can be resolved by simply re-orienting the lens, there are times when it's important to consult an eye care professional. Your eye health is paramount, and contact lenses are medical devices that require professional guidance.

You should seek professional advice if you experience any of the following:

Persistent discomfort, redness, or irritation even after correcting the lens's orientation and reinserting it.
Any signs of eye pain, discharge, or unusual sensitivity to light.
Sudden changes in vision or persistent blurriness that doesn't resolve.
If you suspect an eye infection or irritation that doesn't improve within a few hours of removing the lens.

It's crucial to remember that contact lenses, including the beautiful colored options from MyEyeColors, require a valid prescription and a proper fitting by a licensed eye care professional. They will ensure the lenses fit your eyes correctly and provide you with essential instructions on care, hygiene, and safe wear. Never share your contact lenses with anyone, as this can transmit serious eye infections. Regular check-ups are also vital to monitor your eye health and ensure your lenses continue to be suitable for your eyes.

Key Takeaways

The primary test for a correct contact lens is the "perfect bowl" shape (a smooth "U").
An inside-out lens will have flared edges, forming a "V" shape.
The "Taco Test" can confirm orientation by how the lens folds naturally.
Wearing a contact inside out causes immediate discomfort, irritation, and potentially blurry vision, but is rarely harmful long-term.
Always practice good hygiene and consult an eye care professional for persistent issues or proper lens fitting.