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Can I Wear Contacts with a Different Base Curve?

Mar 22,2024 | Ariana

Have you ever pondered the rationale behind the prevalence of 8.6 mm on contact lens cases? What's the story behind this enigmatic figure? Additionally, there's a belief that a larger base curve value leads to greater comfort— but is this really true? Tune in today as Unibling explores the realm of base arc values to unveil the solutions to these pressing inquiries.

What Does the Base Curve Number Mean?

The base curve of a contact lens refers to the curvature of the inner surface of the lens, which aligns with the curve of your eye. When selecting contact lenses, the base curve plays a crucial role. This number is essential for determining how well the contact lens fits. Typically measured in millimeters, the base curve ranges from values such as 8.0 mm to 9.0 mm.

Even a slight variance in base curve can influence how the lens fits on your eye and interacts with your tear film. For instance, a smaller base curve, such as 8.4 mm, indicates a steeper curvature, while a larger base curve, like 8.6 mm, suggests a flatter curvature. Despite the seemingly minor difference between an 8.4 and an 8.6 base curve for contact lenses, it can significantly impact comfort and fit. The selection between these two base curves is contingent upon the individual's eye shape and curvature.

Unibling Contacts Base Curve

As the base curve number increases, the corneal curvature becomes flatter.

Why Are the Base Curves of Unibling Colored Contacts Mostly 8.6 mm?

Unibling predominantly uses an 8.6 mm base curve in its contacts based on extensive research into the average curvature of the human eyeball. The majority of individuals have an eyeball curvature close to 8.6 mm, which falls within the typical range. This curvature is influenced by both the cornea and conjunctiva, with the cornea's average radius ranging from about 7.8 mm to 8.7 mm. Therefore, opting for an 8.6mm base curve ensures a better fit for most people's eyes, resulting in a more comfortable wearing experience.

This decision is supported by ophthalmic research, as highlighted in Contact Lens Spectrum's article, "Fitting the Lens to the Cornea: A Primer on Contact Lens Base Curves." The authors emphasize considering eyeball curvature when selecting a contact lens base curve, noting that an 8.6 mm base curve typically accommodates most individuals.

Furthermore, Unibling's choice of an 8.6mm base curve is informed by thorough market data analysis to cater to a broad user base, ensuring optimal comfort and fit in practical usage scenarios.

Unibling Blue Colored Contacts

Unibling New York Blue Colored Contacts - Designed with an 8.6 mm Base Curve to Fit Most People

Is It Better to Have a Larger Base Curve for Colored Lenses?

Actually, it depends on the specific requirements of the wearer's eyes. Here are some pros and cons:

  • Pros:
  1. More Stable Position: A larger base curve can provide better coverage over the eye, keeping the contact lens more stable in place.
  2. Natural Appearance: Some people believe that colored contact lenses with a larger base curve can offer a more natural appearance, especially for those looking to enhance their eyes for a brighter look.
  • Cons:
  1. Comfort Issues: A larger base curve may not be suitable for everyone as it can lead to increased contact between the contact lens and the eye, causing discomfort or dryness.
  2. Extended Adaptation Time: Due to the broader coverage of colored contact lenses with a larger base curve, it may take longer to adapt to them, especially for first-time contact lens wearers.

Therefore, not everyone is suited for contact lenses with a larger base curve. We recommend consulting a professional eye care provider to obtain personalized specifications such as base curve and other parameters tailored to your individual eye conditions and comfort preferences. This will help you choose the most suitable colored lenses for you.

Can I Wear Contacts with a Different Base Curve?

No, it's not recommended to wear contact lenses with an incorrect base curve. There are various issues triggered:

  • Increased risk of corneal damage: If the base curve doesn't match your eye's curvature, the lens may move excessively with each blink, increasing the risk of corneal abrasions or infections. This movement can cause pain, increase the likelihood of debris getting trapped behind the lens, and potentially lead to corneal abrasions.
  • Visual disturbances: Wrong base curve contact lenses may result in blurred vision or visual distortions.
  • Discomfort and irritation: Wearing contact lenses with an improper base curve can cause discomfort, a feeling of something in the eye, or irritation. An excessively large base curve can restrict oxygen flow to the eyes, leading to swelling, inflammation, and increased light sensitivity.
  • Eye pain and dryness: The wrong base curve can cause eye pain and dryness due to poor fit and reduced oxygen flow to the cornea.
  • Headaches and other symptoms: Ill-fitting lenses can cause eye strain, causing headaches and related symptoms.

Ensuring that the base curve of your contact lenses matches your eye's curvature is essential to prevent these issues and maintain optimal eye health and comfort.

Unibling's Focus on Base Curve Precision: Enhancing Comfort and Fit

Wearing contacts with the wrong base curve can lead to corneal damage, visual disturbances, discomfort, and other issues. Matching the base curve to your eye is crucial for optimal eye health and comfort. Before considering wearing contacts with a larger base curve, consult your eye care provider to ensure the best fit and performance. In Unibling, prioritizing quality and comfort, we help you select your colored lenses with the most suitable base curve. 


Does base curve affect prescription?

No, the base curve of a contact lens does not directly affect the prescription. The base curve is important for ensuring a proper fit on the eye. The prescription for contact lenses, on the other hand, relates to the specific corrective power needed to address refractive errors such as nearsightedness, farsightedness, or astigmatism. While the base curve is crucial for comfort and eye health, it is distinct from the prescription itself.