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Colored Contacts Lenses Knowledge | How many do you know?

Aug 05,2023 | MCLEYE

Common Terms Explanation:

Colored contact lenses have gained popularity due to their ability to quickly change one's appearance. It is essential to familiarize oneself with common words associated with these lenses to make informed decisions about them. Understanding these terms allows us to make well-informed choices when selecting and using colored contact lenses to achieve the desired look.

1. DIA (Diameter): DIA refers to the diameter of the colored contact lens, typically measured in millimeters. It indicates the extent of coverage on the eye's surface provided by the lens.

2. G.DIA (Graphic Diameter): Graphic diameter, often referred to as G.DIA, represents the area of the lens that incorporates the colored pattern or design. Considering G.DIA is crucial as it affects how the colored part interacts with and appears against your natural eye color.

DIA (Diameter)

3. WT (Water Content): Water content refers to the percentage of water contained in colored contact lenses. Higher water content in the lenses tends to enhance comfort while wearing them, thereby reducing the likelihood of experiencing dryness and irritation.

4. Base Curve (BC): Base curve determines the curvature of the contact lens, ensuring a comfortable fit that matches your eye's natural shape. An incorrect BC can lead to discomfort and vision problems.

Base Curve (BC)

5. ‘’OD‘’ and ‘’OS‘’: In a prescription, "OD" and "OS" are abbreviations used to indicate the eyes for which specific medications or corrective lenses are prescribed. These abbreviations are derived from Latin terms:

  • OD: "OD" stands for "oculus dexter," which translates to "right eye" in English.
  • OS: "OS" stands for "oculus sinister," which translates to "left eye" in English.

So, if you see "OD" written in your prescription, it means that the medication or corrective lenses are meant for your right eye. Similarly, "OS" indicates that the prescription is for your left eye. It's essential to follow the prescription accurately to ensure proper treatment or vision correction for each eye. Additionally, you might also come across "OU," which stands for "oculus uterque," meaning "both eyes."

6. Power (PWR or SPH): For colored contact lenses, pay attention to the power measurement (PWR or SPH) if you have a vision prescription. Select the correct power to effectively correct your vision.

‘’+‘’ and ‘’-‘’: In the context of a prescription, the symbols "+" and "-" typically refer to the refractive power of corrective lenses used to correct vision problems such as nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. These symbols are followed by numerical values, expressed in diopters (D), which indicate the strength of the lenses needed to provide clear vision.

  •  "+" (Plus sign): The plus sign indicates that the prescription is for hyperopia (farsightedness). Hyperopia is a condition where distant objects can be seen more clearly than nearby objects. The higher the positive number following the plus sign, the stronger the lens required to correct the farsightedness.
  •  "-" (Minus sign): The minus sign indicates that the prescription is for myopia (nearsightedness). Myopia is a condition where nearby objects can be seen more clearly than distant objects. The higher the negative number following the minus sign, the stronger the lens required to correct nearsightedness.

For example:

- If you see "+2.50" in your prescription, it means you have hyperopia, and you need corrective lenses that have a power of +2.50 diopters.
- If you see "-2.00" in your prescription, it means you have myopia, and you need corrective lenses that have a power of -2.00 diopters.

In some prescriptions, you may also see the "+" or "-" symbol associated with cylindrical power (astigmatism correction), which helps to address distorted or blurred vision caused by irregularities in the curvature of the eye.

Always follow your prescription accurately when getting glasses or contact lenses for proper vision correction and eye comfort. Consult your eye care professional for any questions or concerns about your prescription or eyewear.


FAQs about Colored Contact Lenses:

Q1: Are colored contact lenses safe to wear?

A: Yes, colored contact lenses are safe to wear, but only when obtained from a reputable source and used correctly. It is crucial to follow your eye care professional's recommendations and maintain proper lens hygiene to prevent any potential complications.

Q2: Can everyone wear colored contact lenses?

A: Most people can wear colored contact lenses, but individuals with certain eye conditions or allergies may be advised against them. Consult an eye care professional to determine if colored lenses are suitable for you.

Q3: Are there colored contact lenses for people with astigmatism?

A: Yes, there are colored contact lenses specifically designed for individuals with astigmatism, known as toric-colored lenses. These lenses not only correct astigmatism but also offer the option to change or enhance eye color. Mcleye currently does not offer toric-colored lenses,  sorry for the inconvenience.

Q4: How long can I wear colored contact lenses?

A: The duration you can wear colored contact lenses varies according to their type. Daily disposable lenses are designed for single-day use, while other types, such as Mcleye's yearly colored contact lenses, can be worn for an extended period, typically lasting for one year. It's essential to follow the manufacturer's guidelines to ensure safe and comfortable use.

Q5: Can I sleep while wearing colored contact lenses?

A: It is not advisable to sleep while wearing colored contact lenses, particularly if they are not intended for extended wear. Sleeping with lenses can raise the likelihood of eye infections and cause discomfort. It is crucial to follow the recommended guidelines provided by your eye care professional for the safe use of colored contact lenses.

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