what is dia in contact lenses

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what is dia in contact lenses

Diameter: This stands for Diameter and is the length of the contact lens from one edge of the lens to the other. This is effectively the size of the contact lens and is used to make sure the contact lens covers the correct parts of your eye. E.g. DIA 13.8.

Can I wear contacts with a different diameter?

It is not recommended to wear contact lenses with a different diameter from your prescription. If the diameter is too wide, the lens will be loose in the eye and may slip out of place. If the diameter is too small, the lens will have a tight fit, causing discomfort.

Is diameter important for contact lenses?

It is not recommended to wear contact lenses with a different diameter from your prescription. If the diameter is too wide, the lens will be loose in the eye and may slip out of place. If the diameter is too small, the lens will have a tight fit, causing discomfort.

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What is DIA 14.2 contact lenses?

DIA 14.2mm means the total size of the contact lens is 14.2mm. 14.2mm contacts are considered small size contacts that give a little expansion effect on the eyes. Nowadays, many people are using big size contacts such as 15mm diameter contacts. However, the best-selling contacts are the 14.2mm diameter contacts.

How do I know what size to get my contacts?

In a simple approach, a card or ruler showing different pupil sizes is held next to your eye to determine the best match. Your eye doctor may hold a pupil gauge next to your eye to determine the approximate size of your eye's pupil as part of your contact lens eye examination.

What is the difference between 14.0 and 14.2 diameter contacts?

In fact, there is not much difference between these two. Some manufacturers only make 14.2mm diameter contacts, and some others produce 14.0mm diameter contacts. However, there is no manufacturer that makes both 14.0mm and 14.2mm diameter contacts. This is because they only choose one of these two small size contacts.

What is the normal diameter for contact lenses?

The diameter of regular contact lenses that are sold in the United States are on average 14mm–16mm. Similar to the diameter of regular contact lenses, circle lenses have no more than 15mm diameter since larger sizes would be harmful to the eyes at daily wear.

Is there a big difference between 8.4 and 8.6 base curve?

— Studies show that a single base curve of 8.4mm managed a “good or better” fit in approximately 90% of individuals,1 and base curves of 8.4mm and …

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What does the diameter of a contact lens mean?

Diameter: This stands for Diameter and is the length of the contact lens from one edge of the lens to the other. This is effectively the size of the contact lens and is used to make sure the contact lens covers the correct parts of your eye.

Is diameter important for contact lenses?

It is not recommended to wear contact lenses with a different diameter from your prescription. If the diameter is too wide, the lens will be loose in the eye and may slip out of place. If the diameter is too small, the lens will have a tight fit, causing discomfort.

Does the BC on contacts matter?

Yes they do matter. The BC, or base curve, is measured based on your cornea's curvature. If the base curve is too small, it'll squeeze your eye, and if it is too big, it won't stay on your cornea. These both may cause damage to your eye.

What if the BC is wrong in contacts?

If your lenses have the wrong diameter or base curve, you'll likely feel that something is always in your eye. If the lenses are too flat, your eyelids will tend to dislodge them when you blink. The wrong size lenses can even cause an abrasion of your cornea.

Does BC and DIA matter for contacts?

Yes it matters. The diameter and its base curve should be according to your size of your cornea and its curvature. This two parameters are also useful to achieve optimal fit of C.L on eyes.

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