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A Must-Read for Beginners: How to Choose the Right Contact Lens Diameter for Yourself?

Sep 16,2023 | Lense365


Many people opt for contact lenses not just for the convenience they offer over traditional glasses but also for their decorative aspect. How can you subtly enhance and magnify your eyes to reveal their true spirit? The choice of contact lens diameter, especially the colored diameter, is crucial. Today, let's talk about what the diameter of colored contact lenses is and how different sizes make a difference. Let’s dive in!


PART 1: What is the Diameter of Contact Lenses?

The diameter of contact lenses is the maximum straight-line distance between two opposing edges of the lens, typically ranging from 13.4MM to 14.5MM. Generally, a lens diameter of about 14.0MM to 14.5MM is suitable for most Americans.

The choice of lens diameter should be made based on several factors, including the size of the individual's cornea, the size of the eyelid opening, and the fit of the contact lenses. If the lens diameter is too small, it may lead to slippage and discomfort; if it's too large, it could affect the efficiency of tear circulation, leading to slowed eye metabolism and corneal hypoxia.

There are three categories based on lens diameter size: small diameter ≤14.0MM (a boon for people with small eyes), medium diameter 14.0MM~14.2MM (suitable for most people, offering a natural pupil-dilating effect), and large diameter ≥14.2MM (fit for people with large eyes, usually worn with eye makeup).

The colored diameter of the lens, which refers to the size of the tinted part of the lens, typically ranges between 13MM and 14MM. There are three sizes: small, colored diameter ≤13MM (suitable for people with small eyes), medium, colored diameter 13MM~14.0MM (naturally magnifies the eyes, suitable for most people), and large, colored diameter ≥14.0MM (provides a noticeable pupil-dilating effect, suitable for people with large eyes).


PART 2: How to Choose the Right Diameter for Yourself?

The selection of contact lens diameter should ideally be based on the lens color and pattern, the size of the wearer's eyes and pupils, or it can also be chosen based on the results of an eye examination under the guidance of a professional. When the proportion of white to black to white in the eye is 1:2:1, the eyes are in a naturally magnified state.

In conclusion, when the lens diameter is the same/not the same, the larger the colored diameter, the more apparent the eye magnification effect; when the colored diameter is the same, the effect can also depend on the color and pattern of the lens—the darker the color, the more pronounced the magnification effect.

Lastly, since everyone’s eye conditions and sizes vary, the factors considered when purchasing contact lenses differ. The material, base curve, diameter, and water content of the colored lenses are important metrics to consider. Everyone should take into account all these metrics along with their personal needs to choose the most suitable lenses for themselves.